functions.php

<?php


// Creates New Nav/Menus
register_nav_menus( array(
	'desktop_large' => 'Primary Large Desktop Menu',
	'desktop_small' => 'Smaller Desktop Menu',
));

// Places the HTML high up into the DOM
function desktop_nav() {
  echo '
    <a href="#" class="desktop-menu-toggle">Toggle Menu</a>
  
    <div class="desktop-menu-wrap">
      <div class="desktop-menu-large">
  ';
  wp_nav_menu( array(
      'theme_location' => 'desktop_large'
  ));
  echo '
      </div>
      <div class="desktop-menu-small">
  ';
  wp_nav_menu( array(
      'theme_location' => 'desktop_small'
  ));
  echo '
      </div>
    </div>';
}
add_action('fl_body_open', 'desktop_nav');

// Loads the JS needed to toggle the menu
function desktop_nav_script() {
    wp_enqueue_script( 'desktop-js', get_stylesheet_directory_uri() . '/js/desktop-nav.js', array( 'jquery' ) );
    wp_enqueue_style( 'desktop-css', get_stylesheet_directory_uri() . '/css/desktop-nav.css' );
}
add_action( 'wp_enqueue_scripts', 'desktop_nav_script' );