Twitter bootstrap markup for zf2 navigation

menu.phtml

<?php 
/**
 * Funzionalità iterativo-ricorsiva per la generazione del menù
 */
if(!function_exists('renderMenu')) {
    function renderMenu($container, $obj, $step = 0) {
        $html = '';
        if(null !== $container && $container->count()) {

            if(!$step) {
                $html.= '<ul class="nav nav-pills">' . PHP_EOL;
                $step++;
            } elseif($step == 1) {
                $html.= '<ul class="dropdown-menu">' . PHP_EOL;
                $step++;
            } else {
                $html.= '<ul class="dropdown-menu sub-menu">' . PHP_EOL;
            }
            
            foreach($container AS $page) {
                $class = array();
                if(null !== $page->class) {
                    $class[] = $page->class;
                }
                if($page->isActive(true)) {
                    $class[] = "active";
                }
                if($page->count() > 0) {
                    $class[] = "dropdown";
                }
                
                $class = implode(" ", $class);
                
                if($page->count() > 0) {
                    $html.= '<li class="' . $class .'"><a style="cursor: \'pointer\';" class="dropdown-toggle" data-toggle="dropdown">' . $obj->translate($page->label);
                    if($step == 1) {
                         $html.= '<b class="caret"></b></a>';
                    } else {
                        $html.= '<i >&nbsp;</i><i class="icon-arrow-right"></i></a>';
                    }
                } else {
                    $html.= '<li class="' . $class .'"><a href="' . $page->getHref() . '" >' . $page->getLabel() . '</a>';
                }
                
                // Ricorsione per le sottopagine
                if($page->count() > 0) {
                    $html.= renderMenu($page, $obj, $step);
                }
                $html.= '</li>' . PHP_EOL;
                
                if(!$step) {
                    $html.= '<li class="divider-vertical"></li>' . PHP_EOL;
                }
            }
            $html.= '</ul>' . PHP_EOL;
        }
        return $html;
    }
}

echo renderMenu($this->container, $this);
?>