use Bitrix\Main\Type\Collection;
use Bitrix\Currency\CurrencyTable;
use Bitrix\Highloadblock as HL;
use Bitrix\Main\Entity;

CModule::IncludeModule('iblock');
CModule::IncludeModule('highloadblock');

$id_ib = '17';
$id_ib_catalog = '2';
$id_hlb = '3'; //id HLB "Manufacturer"

$i=0;
$arSelect = Array("ID", "NAME", "DATE_ACTIVE_FROM", "PROPERTY_MANUFACTURER", "PROPERTY_MANUFACTURER_NEW");
$arFilter = Array("IBLOCK_ID"=>IntVal($id_ib_catalog), "ACTIVE_DATE"=>"Y", "ACTIVE"=>"Y");
$res = CIBlockElement::GetList(Array(), $arFilter, false, false, $arSelect);
while($ob = $res->GetNextElement())
{

    $arFields[$i] = $ob->GetFields();

    $hlblock_requests=HL\HighloadBlockTable::getById($id_hlb)->fetch(); //requests
    $entity_requests=HL\HighloadBlockTable::compileEntity($hlblock_requests);
    $entity_requests_data_class = $entity_requests->getDataClass();
    $main_query_requests = new Entity\Query($entity_requests_data_class);

    $main_query_requests->setSelect(array('ID','UF_NAME', 'UF_XML_ID'))->setFilter(array("UF_XML_ID" =>$arFields[$i]["PROPERTY_MANUFACTURER_VALUE"]));
    //$main_query_requests->setSelect(array('ID','UF_NAME'))->setFilter(array('*'));
    $result_requests = $main_query_requests->exec();
    $result_requests = new CDBResult($result_requests);

   while($row_requests=$result_requests->Fetch()){
       $arFields[$i]["PROPERTY_MANUFACTURER_NAME_FROM_HL"] = $row_requests;
    }
    $i++;
}
//pr($arFields);
unset($i);

foreach ($arFields as $key=> $field){
$arSelect2 = Array("ID", "NAME");
$arFilter2 = Array("IBLOCK_ID"=>IntVal($id_ib), "ACTIVE_DATE"=>"Y", "ACTIVE"=>"Y", "=NAME" => $arFields[$key]["PROPERTY_MANUFACTURER_NAME_FROM_HL"]["UF_NAME"]);
$res1 = CIBlockElement::GetList(Array(), $arFilter2, false, false, $arSelect2);
    while($ob1 = $res1->GetNextElement())
    {


        $arFieldsBrand = $ob1->GetFields();
        $arFields[$key]["PROPERTY_MANUFACTURER_NAME_FROM_IB"] = $arFieldsBrand;

    }


    /*$ELEMENT_ID = $arFields[$key]["ID"];  // код элемента
    $PROPERTY_CODE = "MANUFACTURER_NEW";  // код свойства
    $PROPERTY_VALUE = $arFields[$key]["PROPERTY_MANUFACTURER_NAME_FROM_IB"]["ID"];  // значение свойства

    // Установим новое значение для данного свойства данного элемента
    CIBlockElement::SetPropertyValuesEx($ELEMENT_ID, 2 , array($PROPERTY_CODE => $PROPERTY_VALUE));*/
}