$q= Doctrine_Query::create()
                    ->from('Quiz q')
                    ->where('q.id = ?' , $id);

            $quiz=$q->fetchOne();
            echo $quiz['id'], $values['title'], $values['CategoryID'],$description;
            //die();
             if($quiz)
             {
                $quiz->title=$values['title'];
                $quiz->description=$description;
                $quiz->CategoryID =$values['CategoryID'] ;
                $quiz->save();
             }