Buddypress Group creation step reordering [closed]

See function groups_action_sort_creation_steps() inside bp-groups/bp-groups-actions.php.

See $temp var, is an array, you can change her index. Default:

Array
(
    [0] => Array([name] => Details, [slug] => group-details),
    [10] => Array([name] => Settings, [slug] => group-settings),
    [20] => Array([name] => Avatar[slug] => group-avatar)
    [30] => Array([name] => Invites[slug] => group-invites)
)

Re-order:

Array
(
    [0] => Array([name] => Details, [slug] => group-details),
    [10] => Array([name] => Invites[slug] => group-invites)
    [20] => Array([name] => Settings, [slug] => group-settings),
    [30] => Array([name] => Avatar[slug] => group-avatar)
)