Кэширование при использовании api — как?

$cntIBLOCK_List = 10;
$cache = new CPHPCache();
$cache_time = 3600;
$cache_id = 'arIBlockListID'.$cntIBLOCK_List;
$cache_path = '/arIBlockListID/';
if ($cache_time > 0 && $cache->InitCache($cache_time, $cache_id, $cache_path))
{
   $res = $cache->GetVars();
   if (is_array($res["arIBlockListID"]) && (count($res["arIBlockListID"]) > 0))
      $arIBlockListID = $res["arIBlockListID"];
}
if (!is_array($arIBlockListID))
{
   $res = CIBlock::GetList(
      Array(), 
      Array(
         'TYPE' => 'catalog', 
         'SITE_ID' => SITE_ID, 
         'ACTIVE' => 'Y', 
         "CNT_ACTIVE" => "Y", 
         "!CODE" => 'test%'
      ), true
   );
   while($ar_res = $res->Fetch())
   {
      if($ar_res['ELEMENT_CNT'] > 0)
      $arIBlockListID[] = $ar_res['ID'];
   }
   //////////// end cache /////////
   if ($cache_time > 0)
   {
         $cache->StartDataCache($cache_time, $cache_id, $cache_path);
         $cache->EndDataCache(array("arIBlockListID"=>$arIBlockListID));
   }
}