if (0 == $cat->getVar('cat_nb_photo')) {
                    $criteria = new \CriteriaCompo();
                    $criteria->add(new \Criteria('nleft', $cat->getVar('nleft'), '<'));
                    $criteria->add(new \Criteria('nright', $cat->getVar('nright'), '>'));
                    $catHandler->updateFieldValue('cat_nb_album', 'cat_nb_album + 1', $criteria);