function vts_dashboard_menu() {

  $items['admin/backoffice/production'] = array(
    'title' => 'Production',
    'description' => 'Edit catalogue',
    'page callback' => 'vts_dashboard_backoff_circuits',
    'access callback' => 'vts_dashboard_user_has_role',
    'access arguments' =>  array('éditeur voyages', 'éditeur taxonomie', 'administrator'),
    'type' => MENU_NORMAL_ITEM,
    'menu_name' => 'management',

    //2 alternative tests below. EVEN WITH TRUE, doesn't show up for non admin
    //'access callback' => TRUE,
    //OR ...
    //'access callback' => 'node_access',
    //'access arguments' => array('view', 1),
  );

  $items['admin/backoffice/production/circuits'] = array(
    'title' => 'Circuits',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => -10,
    'access callback' => 'vts_dashboard_user_has_role',
    'access arguments' =>  array('éditeur voyages', 'administrator'),
  );
  // ... more items...
);
//page callback function
function vts_dashboard_backoff_circuits(){
  $viewname = 'circuits_vts';
  $viewdisplay = 'backoffice_products_list';
  return views_embed_view($viewname, $viewdisplay);
}
//access callback function
function vts_dashboard_user_has_role() {
  global $user;
  $roles = func_get_args();
  foreach ($roles as $role) {
    if (in_array($role, $user->roles)) {
      return TRUE;
    }
  }
  return FALSE;
}