public function index()
 {
     $id = I('get.id', '1');
     $node = D('node');
     $nodeName = $node->where(array('id' => $id))->getField('cname');
     $list = $node->where(array('pid' => $id))->select();
     SubjectController::DG_getList($list);
     $this->assign('nodeName', $nodeName);
     $this->assign('list', $list);
     $this->assign('left', 'Blocks/left');
     $this->assign('url', "lists");
     session('nodeId', $id);
     //初始化实用
     $this->display("Index/index");
 }