public static function removeHtmlTags($from)
 {
     if (is_array($from)) {
         $res = array();
         foreach ($from as $string) {
             $res[] = CartAPI_Handlers_Helpers::removeHtmlTagsFromString($string);
         }
         return $res;
     } else {
         return CartAPI_Handlers_Helpers::removeHtmlTagsFromString($from);
     }
 }