public function role()
 {
     $data = mod_menu::get_role_list();
     pm_tpl::assign('ur_here', '角色管理');
     pm_tpl::assign('action_link', array('href' => '?c=member&a=addrole', 'text' => '添加新角色'));
     pm_tpl::assign('full_page', 1);
     pm_tpl::assign('admin_list', $data);
     pm_tpl::display('member_role');
 }