protected function _getAcos() {
        $acos = $this->Acl->Aco->find('all', array('order' => 'Acos.lft ASC', 'recursive' => -1))->toArray();
        $parents = array();
        foreach ($acos as $key => $data) {

            $aco = & $acos[$key];
            $aco = $aco->toArray();
            $id = $aco['id'];
            
            // Generate path
            if ($aco['parent_id'] && isset($parents[$aco['parent_id']])) {
                $parents[$id] = $parents[$aco['parent_id']] . '/' . $aco['alias'];
            } else {
                $parents[$id] = $aco['alias'];
            }
            $aco['action'] = $parents[$id];
        }
        return $acos;
    }