public function _header()
 {
     $t = Engine::getType();
     if ($t == 'user') {
         $r = RequestHandler::singleton();
         if ($r->getController() != 'styleswitcher') {
             $template = HBLoader::LoadComponent('Template');
             $template->register_outputfilter(array($this, 'pre_filter'));
         }
     }
 }