public function action_index() { $data = array(); if (!is_readable(APPPATH . 'config/database.php')) { Request::initial()->redirect('install'); } $cat = new Model_Category(); $materials = new Model_Material(); $cat->checkTree(); $tree = $cat->getTree(); $data['tree'] = $cat->getITree($tree); $data['teachers'] = $materials->getTeachersGropupByNode(); $this->tpl->content = View::factory('main', $data); }