diff --git a/lib/EntityManager.php b/lib/EntityManager.php
index fab6214..23c754e 100644
--- a/lib/EntityManager.php
+++ b/lib/EntityManager.php
@@ -244,7 +244,7 @@ public function delete()
 
 		$model = $this->modelClass;
 
-        $result = $model::delete($this->itemId); // удаляем основную сущность
+        $result = $model::delete($this->helper->getPk()); // удаляем основную сущность
 		if(!$result->isSuccess()){  // если не удалилась
 			$db->rollbackTransaction(); // то восстанавливаем зависимые сущности
 			return $result; // возвращаем ошибку
diff --git a/lib/helper/AdminBaseHelper.php b/lib/helper/AdminBaseHelper.php
index f71ca7c..d1524c6 100644
--- a/lib/helper/AdminBaseHelper.php
+++ b/lib/helper/AdminBaseHelper.php
@@ -6,6 +6,7 @@
 use Bitrix\Main\LoaderException;
 use Bitrix\Main\Localization\Loc;
 use Bitrix\Main\ModuleManager;
+use DigitalWand\AdminHelper\EntityManager;
 use DigitalWand\AdminHelper\Widget\HelperWidget;
 use Bitrix\Main\Entity\DataManager;
 use Bitrix\Highloadblock as HL;
@@ -108,6 +109,15 @@ abstract class AdminBaseHelper
 	 */
 	static protected $model;
 
+	/**
+	 * @var string
+	 * Имя класса используемого менеджера сущностей. Используется для выполнения CRUD-операций.
+	 *
+	 * @see DataManager
+	 * @api
+	 */
+	static protected $entityManager = '\DigitalWand\AdminHelper\EntityManager';
+
 	/**
 	 * @var string
 	 * Назвние модуля данной модели.
@@ -598,6 +608,17 @@ public function pk()
 		return 'ID';
 	}
 
+	/**
+	 * Возвращает значение первичного ключа таблицы используемой модели
+	 * @return array|int|null
+	 * 
+	 * @api
+	 */
+	public function getPk()
+	{
+		return isset($_REQUEST['FIELDS'][$this->pk()]) ? $_REQUEST['FIELDS'][$this->pk()] : $_REQUEST[$this->pk()];
+	}
+
 	/**
 	 * Возвращает первичный ключ таблицы используемой модели разделов. Для HL-инфоблоков битрикс - всегда ID.
      * Но может поменяться для какой-либо другой сущности.
diff --git a/lib/helper/AdminEditHelper.php b/lib/helper/AdminEditHelper.php
index 518a54a..1affd4a 100644
--- a/lib/helper/AdminEditHelper.php
+++ b/lib/helper/AdminEditHelper.php
@@ -119,7 +119,7 @@ public function __construct(array $fields, array $tabs = array())
 			if ($this->editAction()) {
 				if (isset($_REQUEST['apply'])) {
 					$id = $this->data[$this->pk()];
-					$url = $this->app->GetCurPageParam($this->pk() . '=' . $id);
+					$url = $this->app->GetCurPageParam($this->pk() . '=' . (is_array($id) ? $id[$this->pk()] : $id), array('ID'));
 				}
 				else {
 					if (isset($_REQUEST['save'])) {
@@ -430,7 +430,7 @@ protected function editAction()
 		if ($success) {
 			$this->setContext(AdminEditHelper::OP_EDIT_ACTION_AFTER);
 			$existing = false;
-			$id = isset($_REQUEST['FIELDS'][$this->pk()]) ? $_REQUEST['FIELDS'][$this->pk()] : $_REQUEST[$this->pk()];
+			$id = $this->getPk();
 
 			if ($id) {
 				/** @var DataManager $className */
@@ -487,9 +487,9 @@ protected function editAction()
 	 */
 	protected function loadElement($select = array())
 	{
-		if (isset($_REQUEST[$this->pk()])) {
+		if ($this->getPk() !== null) {
 			$className = static::getModel();
-			$result = $className::getById($_REQUEST[$this->pk()]);
+			$result = $className::getById($this->getPk());
 
 			return $result->fetch();
 		}
@@ -515,9 +515,8 @@ protected function loadElement($select = array())
 	 */
 	protected function saveElement($id = null)
 	{
-		$className = static::getModel();
-		$entityManager = new EntityManager($className, $this->data, $id, $this);
-
+		/** @var EntityManager $entityManager */
+		$entityManager = new static::$entityManager(static::getModel(), empty($this->data) ? array() : $this->data, $id, $this);
 		$saveResult = $entityManager->save();
 		$this->addNotes($entityManager->getNotes());
 
@@ -542,9 +541,9 @@ protected function deleteElement($id)
 
 			return false;
 		}
-
-		$className = static::getModel();
-		$entityManager = new EntityManager($className, array(), $id, $this);
+		
+		/** @var EntityManager $entityManager */
+		$entityManager = new static::$entityManager(static::getModel(), empty($this->data) ? array() : $this->data, $id, $this);
 
 		$deleteResult = $entityManager->delete();
 		$this->addNotes($entityManager->getNotes());
diff --git a/lib/helper/AdminListHelper.php b/lib/helper/AdminListHelper.php
index 7b4d1da..1913458 100644
--- a/lib/helper/AdminListHelper.php
+++ b/lib/helper/AdminListHelper.php
@@ -172,7 +172,7 @@ public function __construct(array $fields, $isPopup = false)
 		$this->prepareAdminVariables();
 
 		$className = static::getModel();
-		$oSort = new \CAdminSorting($this->getListTableID(), static::pk(), "desc");
+		$oSort = new \CAdminSorting($this->getListTableID(), $this->pk(), "desc");
 		$this->list = new \CAdminList($this->getListTableID(), $oSort);
 		$this->list->InitFilter($this->arFilterFields);
 
@@ -419,7 +419,7 @@ protected function getContextMenu()
 				$params = $this->additionalUrlParams;
 				$sectionModel = $sectionEditHelper::getModel();
 				$sectionField = $sectionEditHelper::getSectionField();
-				$section = $sectionModel::getById($_GET['ID'])->Fetch();
+				$section = $sectionModel::getById($this->getPk())->Fetch();
 				if ($this->isPopup()) {
 					$params = array_merge($_GET);
 				}
@@ -516,14 +516,15 @@ protected function groupActions($IDs, $action)
 				if ($sectionEditHelperClass) {
 					$sectionField = !isset($_REQUEST['model']) ? static::getSectionField() :
 						$sectionEditHelperClass::getSectionField();
-					$element = $className::getById($IDs[0])->Fetch();
+					$element = $className::getById($this->getPk())->Fetch();
 					if ($element[$sectionField]) {
 						$params['ID'] = $element[$sectionField];
 					}
 				}
 
 				foreach ($IDs as $id) {
-					$entityManager = new EntityManager($className, array(), $id, $this);
+					/** @var EntityManager $entityManager */
+					$entityManager = new static::$entityManager(static::getModel(), empty($this->data) ? array() : $this->data, $id, $this);
 					$result = $entityManager->delete();
 					$this->addNotes($entityManager->getNotes());
 					if(!$result->isSuccess()){
@@ -541,7 +542,7 @@ protected function groupActions($IDs, $action)
 
 		if ($action == 'delete-section') {
 			if ($this->hasDeleteRights()) {
-				$section = $sectionClassName::getById($IDs[0])->Fetch();
+				$section = $sectionClassName::getById($this->getPk())->Fetch();
 				$sectionField = $sectionEditHelperClass::getSectionField();
 				$params = $_GET;
 				unset($params['action']);
@@ -550,9 +551,9 @@ protected function groupActions($IDs, $action)
 				if ($section[$sectionField]) {
 					$params['ID'] = $section[$sectionField];
 				}
-				foreach ($IDs as $id) {
-					$sectionClassName::delete($id);
-				}
+
+				$sectionClassName::delete($this->getPk());
+
 				LocalRedirect($listHelperClass::getUrl($params));
 			}
 			else {
@@ -750,8 +751,8 @@ public function buildList($sort)
 		}
 
 		$className = static::getModel();
-		$visibleColumns[] = static::pk();
-		$sectionsVisibleColumns[] = static::sectionPk();
+		$visibleColumns[] = $this->pk();
+		$sectionsVisibleColumns[] = $this->sectionPk();
 
 		$raw = array(
 			'SELECT' => $visibleColumns,
@@ -988,7 +989,7 @@ protected function getMixedData($sectionsVisibleColumns, $elementVisibleColumns,
 		}
 		// добавляем к выборке разделы
 		$rsSections = $sectionModel::getList(array(
-			'filter' => $sectionFilter,
+			'filter' => $this->getSectionsFilter($sectionFilter),
 			'select' => $sectionsVisibleColumns,
 			'order' => $sectionSort,
 			'limit' => $limitData[1],
@@ -1033,7 +1034,7 @@ protected function getMixedData($sectionsVisibleColumns, $elementVisibleColumns,
 		}
 
 		$elementParams = array(
-			'filter' => $elementFilter,
+			'filter' => $this->getElementsFilter($elementFilter),
 			'select' => $elementVisibleColumns,
 			'order' => $elementSort,
 		);
@@ -1156,7 +1157,7 @@ protected function getRow($data, $class = false)
 		else {
 			$query = array_merge($this->additionalUrlParams, array(
 				'lang' => LANGUAGE_ID,
-				static::pk() => $data[static::pk()]
+				$this->pk() => $data[$this->pk()]
 			));
 
 			return array($class::getUrl($query));
@@ -1303,7 +1304,7 @@ protected function addRowCell($row, $code, $data, $virtualCode = false)
 	protected function getData($className, $filter, $select, $sort, $raw)
 	{
 		$parameters = array(
-			'filter' => $filter,
+			'filter' => $this->getElementsFilter($filter),
 			'select' => $select,
 			'order' => $sort
 		);
@@ -1435,4 +1436,24 @@ public static function getUrl(array $params = array())
 	{
 		return static::getViewURL(static::getViewName(), static::$listPageUrl, $params);
 	}
+
+	/**
+	 * Кастомизация фильтра разделов
+	 * @param $filter
+	 * @return mixed
+	 */
+	protected function getSectionsFilter(array $filter)
+	{
+		return $filter;
+	}
+
+	/**
+	 * Кастомизация фильтра элементов
+	 * @param $filter
+	 * @return mixed
+	 */
+	protected function getElementsFilter($filter)
+	{
+		return $filter;
+	}
 }
diff --git a/lib/widget/ComboBoxWidget.php b/lib/widget/ComboBoxWidget.php
index 4157e46..ca32e79 100644
--- a/lib/widget/ComboBoxWidget.php
+++ b/lib/widget/ComboBoxWidget.php
@@ -161,14 +161,14 @@ protected function getVariants()
     {
         $variants = $this->getSettings('VARIANTS');
 
-        if (is_array($variants) AND !empty($variants)) {
-            return $this->formatVariants($variants);
-        } elseif (is_callable($variants)) {
+        if (is_callable($variants)) {
             $var = $variants();
 
             if (is_array($var)) {
                 return $this->formatVariants($var);
             }
+        }elseif (is_array($variants) AND !empty($variants)) {
+            return $this->formatVariants($variants);
         }
 
         return array();
diff --git a/lib/widget/StringWidget.php b/lib/widget/StringWidget.php
index 19ea069..bed3275 100644
--- a/lib/widget/StringWidget.php
+++ b/lib/widget/StringWidget.php
@@ -157,8 +157,7 @@ public function generateRow(&$row, $data)
         if ($this->getSettings('MULTIPLE')) {
         } else {
             if ($this->getSettings('EDIT_LINK') || $this->getSettings('SECTION_LINK')) {
-                $entityClass = $this->entityName;
-                $pk = $entityClass::getEntity()->getPrimary();
+                $pk = $this->helper->pk();
 
                 if ($this->getSettings('SECTION_LINK')) {
                     $params = $this->helper->isPopup() ? $_GET : array();