public function all()
 {
     $list = $this->Admin->where(array('is_remove' => 0))->page(I('get.p', 1), 25)->select();
     $this->assign('list', $list);
     $count = $this->Admin->count();
     $Page = new Page($count, 25);
     $show = $Page->show();
     // 分页显示输出
     $this->assign('page', $show);
     // 赋值分页输出
     $this->display();
     // 输出模板
 }