我做了以下工作，如果你有许多帖子类型，可能会很长，但是请随意编辑：

/** Edit Nav Menu calsses **/
function custom_wp_nav_classes($classes, $item){
    global $post;
    $page_blog = get_option(\'page_for_posts\');

    if(is_tax(\'my_taxonomy_name_here\') || is_singular(\'my_post_type_name_here\')){

        /** Remove Active Class from Blog **/
        if($item->object_id == $page_blog)
            $classes = array_filter($classes, "remove_parent");

        /** Page ID of what you want to be active **/
        if($item->object_id == 12)
            $classes[] = \'current_page_parent\';
    }

    return $classes;
}
add_filter(\'nav_menu_css_class\' , \'custom_wp_nav_classes\' , 10 , 2);

// Remove Active Class from Blog when viewing CPTs
function remove_parent($var){
    if ($var == \'current_page_parent\' || $var == \'current-menu-item\' || $var == \'current-page-ancestor\') { return false; }
    return true;
}

WordPress通过添加current_page_ancestor 和/或current_page_parent 对父项初始化。尝试将这些类设置为类似current_menu_item.