BuddyPress.org

Here’s the short version.

In [theme]/forums/index.php, do a conditional check for $bp->current_action == ‘grouped’. (Depending on the URL structure of your site, you might have to use $bp->action_variables[0].) In other words, the ‘grouped’ code should only be displayed if ( $bp->current_action == ‘grouped’ ).

Then do a bp_has_groups loop for all the groups you want to appear. If that’s all your groups, you can just do bp_has_groups(). If you only want to do a certain number of groups, like on this site, do bp_has_groups( ‘include=4,5,6’ ) where 4, 5, 6 are groups that you want to include in the ‘grouped’ view.

Then, inside the `while ( bp_groups() ) : bp_the_group()` loop, do a normal forums loop. Something like
`if ( bp_has_forum_topics( ‘forum_id=’ . groups_get_groupmeta( bp_get_group_id(), ‘forum_id’ ) ) )`
plus whatever arguments for max number, etc you want.