public function getNavbar()
{   
    if ($this->getConf('showNavbar') === 'logged' && !$_SERVER['REMOTE_USER']) {
        return false;
    }

    global $ID;
    global $conf;

    $navbar = $this->toBootstrapNav(tpl_include_page('navbar', 0, 1, $this->getConf('useACL')), 'navbar');

    $navbar = str_replace('urlextern', '', $navbar);

    /**
    * $navbar = preg_replace('/<li class="level([0-9]) node"> (.*)/',
    *     '<li class="level$1 node dropdown"><a href="#" class="dropdown-toggle" data-target="#" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">$2 <span class="caret"></span></a>', $navbar);
    */
    $navbar = preg_replace('/<li class="level([0-9]) node">\s*<a(.*)<\/a>/',
        '<li class="level$1 node dropdown"><a class="dropdown-toggle" role="button" aria-haspopup="true" aria-expanded="false" $2 </a><a href="#" class="dropdown-toggle" data-target="#" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"><span class="caret"></span></a>', $navbar);

    /**
    * $navbar = preg_replace('/<li class="level([0-9]) node active"> (.*)/',
    *     '<li class="level$1 node active dropdown"><a href="#" class="dropdown-toggle" data-target="#" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">$2 <span class="caret"></span></a>', $navbar);
    */
    $navbar = preg_replace('/<li class="level([0-9]) node active">\s*<a(.*)<\/a>/',
        '<li class="level$1 node active dropdown"><a class="dropdown-toggle" role="button" aria-haspopup="true" aria-expanded="false" $2 </a><a href="#" class="dropdown-toggle" data-target="#" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"><span class="caret"></span></a>', $navbar);

    # FIX for Purplenumbers renderer plugin
    # TODO use Simple DOM HTML or improve the regex!
    if ($conf['renderer_xhtml'] == 'purplenumbers') {
        $navbar = preg_replace('/<li class="level1"> (.*)/',
            '<li class="level1 dropdown"><a href="#" class="dropdown-toggle" data-target="#" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">$1 <span class="caret"></span></a>', $navbar);
    }

    $navbar = preg_replace('/<ul class="(.*)">\n<li class="level2(.*)">/',
        '<ul class="dropdown-menu" role="menu">' . PHP_EOL . '<li class="level2$2">', $navbar);

    return $navbar;
}