案例：

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