BuddyPress.org

heini – Just to be clear: What @3sixty is suggesting is that you copy the *entire* groups_setup_nav() function (it’s pretty big), paste it into bp-custom.php, change the name (eg to my_group_setup_nav), make the change to bp_core_new_nav_default, and then do the remove_action/add_action stuff outside the function.

If you do this right, then it will replace the entire function, though most of it will be replaced by the same code.