案例：

function ActivePlugin_tc_cs() {
    Add_Filter_Plugin('Filter_Plugin_Admin_PageMng_SubMenu','tc_Admin_PageMng_SubMenu');
}
 
function tc_Admin_PageMng_SubMenu() {
    echo '<a href="edit.php?act=PageEdt&id=2"><span class="m-left">关于我们</span></a>';
}