Update

CModule::IncludeModule('iblock');
global $USER;
$uID = $USER->GetID();
$el = new CIBlockElement;

$res = CIblockElement::GetList(array(),array('IBLOCK_ID' => 12, 'ACTIVE' => 'Y', 'CATALOG_AVAILABLE' => 'N'), false, false, array('ID'));
$arLoadProductArray = Array(
);
while($ob = $res->GetNext())
{
    print_r($el->Update($ob['ID'], $arLoadProductArray));
    echo $ob['ID'];
    break;
}