Problems with redirecting a BuddyPress custom subnav item [closed]

You can force the link. Try:

bp_core_new_subnav_item( array(
      'name'            => 'Create Virtual Village',
      'slug'            => 'create',
      'parent_url'      => 'groups',
      'parent_slug'     => 'groups',
      'screen_function' => 'false',
      'position'        => 50,
      'link'            => get_option('siteurl') . '/groups/create/step/group-details/'
      )
);