[Laurent42]

Maybe this can help, here is the plugin code:

    $perms = media_permissions();

    $vbulletin->options['selectednavtab'] = 'media';

    $categories = $vbulletin->db->query_read("
        SELECT * FROM ".TABLE_PREFIX."media_category
        WHERE catOrder != '0'
        ORDER BY catOrder
    ");

    $href['playlists'] = construct_href_playlists();
    $href['pmine'] = construct_href_playlists_mine();
    $href['pcreate'] = construct_href_playlists_create();
    $href['favorites'] = construct_href_favorites();
    $href['subscriptions'] = construct_href_subscriptions();
    $href['submit'] = construct_href_submit();
    $href['random'] = construct_href_random();
    $href['cats'] = construct_href_admin("cats");
    $href['tags'] = construct_href_admin("tags");
    $href['host'] = construct_href_admin("host");

    while ($category = $vbulletin->db->fetch_array($categories))
    {
        $category['href'] = construct_href_category($category);

        $category['align'] = "";
        for ($i = 0; $i < $category['catDepth']; $i++) { $category['align'] .= '-- '; }

        $templater = vB_Template::create('8WR_media_NAVTAB_cat');
        $templater->register('category', $category);
        $categorybits .= $templater->render();
    }
}

$templater = vB_Template::create('8WR_media_NAVTAB');
$templater->register('perms', $perms);
$templater->register('href', $href);
$templater->register('categorybits', $categorybits);
$template_hook['navtab_start'] .= $templater->render();