希望我能正确地理解你。不确定您的/小部件内容是实际的小部件，还是仅仅是帖子/页面，但我一直在使用此插件在多站点网络上的站点之间复制内容：http://wordpress.org/extend/plugins/diamond-multisite-widgets/

使用“网络广播”功能。您可以选择要在哪些网站上复制内容。2注意事项：

如果你在站点a上创建一篇文章，播放它，然后再次打开“广播”功能进行修改，它将在站点B上创建第二篇文章。换句话说，你不能播放更新。一旦文章被复制，它就与原文完全分离了

我最终选择了pre_get_posts.

add_action(\'pre_get_posts\', \'custom__pre_get_posts\');

function custom__pre_get_posts($query){
    //Get access to global variables
    global $blog_id;
    global $wp_query;

    //Make sure we\'re not in admin, only run on the main query and don\'t run on our primary site
    if($query->is_admin || !$query->is_main_query() || $blog_id===1){
      return;
    }

    //Try running the query
    $test_obj = $query->get_queried_object();

    //If we didn\'t get a result then the page wasn\'t found
    if(!$test_obj){
      //Switch to the main site
      switch_to_blog(1);
      //Reset the query using the same args as the original (the previous reset changes $wpdb)
      $wp_query = new WP_Query($query->query_vars);
      //Re-query the object again. We might need to perform more sanity checks here
      $test_obj = $query->get_queried_object();
      //Switch back to our current site
      restore_current_blog();
      //
    }else{
      //This is a normal query for a page that exists, we don\'t need to do anything
    }
}