定义两个菜单，并根据它们是否登录提供服务，您可以在主题的functions.php 文件：

if (is_user_logged_in()){
  wp_nav_menu( array(
    \'menu\'            => \'Logged In Menu\',
    \'container_class\' => \'logged-in-menu\',
    \'theme_location\'  => \'logged-in\'
  ));
} else {
  wp_nav_menu( array(
    \'menu\'            => \'Visitor Menu\',
    \'container_class\' => \'visitor-menu\',
    \'theme_location\'  => \'visitor\'
  ));
};

register_nav_menus( array(
  \'logged-in\'  => __( \'Logged-in Menu Area\',  \'yourtheme\' ),
  \'visitor\' => __( \'Visitor Menu Area\', \'yourtheme\' ),
));