使用以下命令显示Register/Site Admin &；Log in/Log out 菜单中的链接：

add_filter(\'wp_nav_menu_items\',\'show_register_login_link\');
function show_register_login_link($nav) {
    // The "Register" link is not offered if the Administration > Settings > General > Membership: Anyone can register box is not checked.
    return $nav.wp_register("<li class=\'menu-item\'>", "</li>", false)."<li class=\'menu-item\'>".wp_loginout(get_site_url(), false)."</li>";
}