Add a new argument for BP_Menu_Walker sub-menu item that allows you to filter the UL class.

[Bowromir]

Because the BuddyPress Navigation menus often are nested several layers deep, it would be nice if you could easily change the default nested <UL> elements generated by the bp_nav_menu function.

For example it could be something like:

<?php
    bp_nav_menu( array(
        'container'         => false,
        'menu_class'        => 'dropdown-menu',
        'sub_menu_class'        => 'sub-menu'
        )
    );
?>

This would make it easier to quickly change the BuddyPress navigation menus to various themes and frameworks (foundation/bootstrap etc).

[DJPaul]

I think we should do this; it's a pretty quick change.

[DJPaul]

While we could add this to BP's walker without much effort, I'm thinking this suggestion is perhaps better suited for the WordPress core trac.

[boonebgorges]

If it's easy for us to do it, let's do it, and also submit an upstream patch. Just make sure our fix is easy enough to swap out if WP does implement the fix.

[DJPaul]

I've given this some thought, and agree with my earlier second opinion. We shouldn't touch this because it's not obvious what core might decide to call the parameter used to control a setting, and on balance, we'd probably call it something different and then have to end up maintaining backwards compatibility for ever. Closing as wontfix, and I'll search/make a ticket on core track as appropriate.