How to add ul class in menu item in wordpress | wordpress.

<?php wp_nav_menu(array(
   'menu' => 'header',
   'theme_location' => 'primary',
    'items_wrap'      => '<ul id="%1$s" class="nav navbar-nav navbar-right">

%3$s</ul>' ,
  ));
  //dynamic_sidebar('sidebar-3');
  ?>