OG Drupal 7 Get First menu in current context

template.php

<?php

// Determine appropriate menu to load
$context = og_context();
$menu_name = 'main-menu';
if ($context) {
  $menus = og_menu_get_group_menus([
    $context['group_type'] => [$context['gid']],
  ]);
  $menu = array_shift($menus);
  if ($menu) {
    $menu_name = $menu['menu_name'];
  }
}