您可能应该首先尝试此插件：http://buddydev.com/buddypress/blog-categories-for-groups-plugin/

或者您可以从中提取一些代码，并尝试自己实现它。开始使用组的博客类别。php，并查看最后几行：

//for single post screen
function screen_group_blog_single_post(){
   global $bp;

   if(function_exists(\'bp_is_group\')&&!bp_is_group())
      return;

    //do not catch the request for creating new post
   if(bp_is_action_variable(\'create\',0))
           return;

   $current_group=groups_get_current_group();

   if(bcg_is_disabled($current_group->id))
           return;
   //if the group is private/hidden and user is not member, return
   if(($current_group->status==\'private\'||$current_group->status==\'hidden\')&&(!is_user_logged_in()||!groups_is_user_member(bp_loggedin_user_id(), $current_group->id)))
   return;//avoid prioivacy troubles

   if (bp_is_groups_component() && bp_is_current_action(BCG_SLUG) &&!empty($bp->action_variables[0]) ){

       $wpq=new WP_Query(bcg_get_query());
        if($wpq->have_posts()){
            //load template
         bp_core_load_template( apply_filters( \'groups_template_group_blog_single_post\', \'bcg/home\' ) );
        }
    else
        bp_core_add_message (__("Sorry, the post does not exists!","bcg"),"error");

   }
}