Add Footer Menu in Genesis Framework (HTML5)

functions.php

<?php

//* Register Footer Menu in Genesis Framework (HTML5)

function afn_add_footer_menu () {
    echo '<nav class="nav-footer" role="navigation" itemscope itemtype="http://schema.org/SiteNavigationElement">'; 
    wp_nav_menu( array( 'sort_column' => 'menu_order', 'container_id' => 'nav-footer' , 'menu_class' => 'menu genesis-nav-menu      menu-footer', 'theme_location' => 'tertiary', 'depth' => '1' ) ); 
    echo '</nav>';
}
add_action('genesis_before_footer', 'afn_add_footer_menu');

//* Add support for footer menu
add_theme_support ( 'genesis-menus' , array ( 'primary' => 'Primary Navigation Menu' , 'secondary' => 'Secondary Navigation Menu' ,'nav-footer' => 'Footer Navigation Menu' ) );