创建一个新的“自定义链接”菜单项，其中URL为#latestpost（它将充当代码的占位符和目标）。您可以根据自己的喜好为该项目命名。然后，此代码将找到该菜单项（通过查找占位符URL），然后将其URL替换为最新帖子的URL。因为过滤器在添加所选CSS类的代码运行之前，所以菜单高亮显示甚至可以工作。当您访问博客上的最新帖子时，此菜单项将亮起。

将代码放在插件或主题函数中。php文件。

// Front end only, don\'t hack on the settings page
if ( ! is_admin() ) {
    // Hook in early to modify the menu
    // This is before the CSS "selected" classes are calculated
    add_filter( \'wp_get_nav_menu_items\', \'replace_placeholder_nav_menu_item_with_latest_post\', 10, 3 );
}
 
// Replaces a custom URL placeholder with the URL to the latest post
function replace_placeholder_nav_menu_item_with_latest_post( $items, $menu, $args ) {
 
    // Loop through the menu items looking for placeholder(s)
    foreach ( $items as $item ) {
 
        // Is this the placeholder we\'re looking for?
        if ( \'#latestpost\' != $item->url )
            continue;
 
        // Get the latest post
        $latestpost = get_posts( array(
            \'numberposts\' => 1,
        ) );
 
        if ( empty( $latestpost ) )
            continue;
 
        // Replace the placeholder with the real URL
        $item->url = get_permalink( $latestpost[0]->ID );
    }
 
    // Return the modified (or maybe unmodified) menu items array
    return $items;
}