<?php
if ( has_nav_menu( 'navbar' ) ) {
    ?>
    <nav id="navbar-navigation" role="navigation" aria-label="<?php _e( 'Navbar Navigation', 'eisai' ); ?>">
        <?php
        wp_nav_menu( array(
            'theme_location' => 'navbar',
            'container' => false,
            'menu_class' => 'uk-navbar-nav uk-visible@l',
            'walker' => new Eisai_Walker_Navbar_Nav_Menu(),
        ) );
        ?>
    </nav>
    <?php
}
