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<?
CModule::IncludeModule("iblock");
$arSelect = array(
      "ID",
      "NAME",
      "CODE",
      "DATE_CREATE",
      "ACTIVE_FROM",
      "CREATED_BY",
      "IBLOCK_ID",
      "IBLOCK_SECTION_ID",
      "DETAIL_PAGE_URL",
      "DETAIL_TEXT",
      "DETAIL_TEXT_TYPE",
      "DETAIL_PICTURE",
      "PREVIEW_TEXT",
      "PREVIEW_TEXT_TYPE",
      "PREVIEW_PICTURE",
      "PROPERTY_*",
   );
$arFilter = array(
    "IBLOCK_ID" => 25,
    "IBLOCK_LID" => 's1',
    "IBLOCK_ACTIVE" => 'Y',
    "ACTIVE_DATE" => 'Y',
    "ACTIVE" => 'Y',
    "CHECK_PERMISSIONS" => 'Y',
    "INCLUDE_SUBSECTIONS" => 'Y',
    "PROPERTY_shops" => Array(374,377,379),
    "SECTION_ID" => 245,
);
$rsElements = CIBlockElement::GetList($arSort, $arFilter, false, false, $arSelect);
while($obElement = $rsElements->GetNextElement())
{
$arItem = $obElement->GetFields();
echo $arItem["NAME"]."<br/>";
}

?>

$arFilter = array(
    "IBLOCK_ID" => 25,
    "IBLOCK_LID" => 's1',
    "IBLOCK_ACTIVE" => 'Y',
    "ACTIVE_DATE" => 'Y',
    "ACTIVE" => 'Y',
    "CHECK_PERMISSIONS" => 'Y',
    "INCLUDE_SUBSECTIONS" => 'Y',
    "PROPERTY_shops" => Array(374,377,379),
    "SECTION_ID" => 245,
); 

$arFilter = array(
    "IBLOCK_ID" => 25,
    "PROPERTY_SHOPS" => Array(374,377,379)
);