Foundation Zurb TopBar Navigation for Drupal

topbar-foundation-drupal.php

//add this in page.tpl.php
<?php if ($main_menu): ?>
    <div class="row">
        <div class="twelve columns">
            <nav id="navigation" class="top-bar">
                <ul>
                    <li class="name"><h1><a href="#">Navigation</a></h1></li>
                    <li class="toggle-topbar"><a href="#"></a></li>
                </ul>
                <section class="section">
                    <ul class="left">
                        <?php print theme(
                            'links__system_main_menu', array('links'      => $main_menu,
                                                             'attributes' => array('id'    => 'main-menu',
                                                                                   'class' => array('links',
                                                                                                    'inline',
                                                                                                    'clearfix')),
                                                             'heading'    => t('Main menu'))
                        ); ?>
                    </ul>                    
                </section>
            </nav>
        </div>
    </div>
<?php endif; ?>
//add this function in template.php
function YOURTHEME_links__system_main_menu($vars)
{
    // Get all the main menu links
    $menu_links = menu_tree_output(menu_tree_all_data('main-menu'));

    // Initialize some variables to prevent errors
    $output = '';
    $sub_menu = '';

    foreach ($menu_links as $key => $link) {
        // Add special class needed for Foundation dropdown menu to work
        !empty($link['#below']) ? $link['#attributes']['class'][] = 'has-dropdown' : '';

        // Render top level and make sure we have an actual link
        if (!empty($link['#href'])) {
            $output .= '<li' . drupal_attributes($link['#attributes']) . '>' . l($link['#title'], $link['#href']);
            // Get sub navigation links if they exist
            foreach ($link['#below'] as $key => $sub_link) {
                if (!empty($sub_link['#href'])) {
                    $sub_menu .= '<li>' . l($sub_link['#title'], $sub_link['#href']) . '</li>';
                }

            }
            $output .= !empty($link['#below']) ? '<ul class="dropdown">' . $sub_menu . '</ul>' : '';

            // Reset dropdown to prevent duplicates
            unset($sub_menu);
            $sub_menu = '';

            $output .= '</li>';
        }
    }
    return $output;
}

What's version of drupal and foundation do you use?