Menus dinâmicos Wordpress

/*header.php*/
<?php
   wp_nav_menu(array(
         'theme_location'  => 'meu-menu',
         'container'       => false, // 'div' container will not be added
         'menu_class'      => 'nav  nav-justified', // <ul class="nav">

   ));
?>
/*functions.php*/
if ( function_exists( 'register_nav_menus' ) ) {
    register_nav_menus(  array(
            'meu-menu'  => 'Meu Menu',
            'menu_rodape'   => 'Menu Rodapé'
        )
    );
}