Bootstrap menu for Fuel CMS

/*
 * Bootstrap menu helper
 * renders menu and optionally 1 sub menu deep
 * Config array is same as for fuel_nav() 
 */
function bootstrap_menu($config = NULL, $float = NULL, $toggle = TRUE) {
    $menu = (is_array($config)) ? fuel_nav(array_merge($config, array('render_type' => 'array'))) : fuel_nav(array('render_type' => 'array'));
    if (is_array($menu)) {
        $container_class = isset($config['container_tag_class']) ? 'nav navbar-nav ' . $config['container_tag_class'] : 'nav navbar-nav';
        $container_id = isset($config['container_tag_id']) ? ' id="' . $config['container_tag_id'] . '"' : '';
        if (isset($float))
            $container_class .= ($float == 'left') ? ' navbar-left' : ' navbar-right';
        $container_start = '<ul class="' . $container_class . '"' . $container_id . '>';
        $container_end = '</ul>';
        $list = '';
        $counter = 0;
        $last = 0;
        $data_toggle = $toggle ? ' data-toggle="dropdown" ' : NULL;
        // find num of displayable links
        foreach ($menu as $show) {
            if ($show['hidden'] == 'no')
                $last++;
        }
        foreach ($menu as $item) {
            if ($item['hidden'] == 'no') {
                $classes = ($counter == 0) ? 'first ' : '';
                $classes .= ($counter == ($last - 1)) ? 'last ' : '';
                $classes .= (strpos('/'.uri_string().'/', $item['location'].'/') === 1 ) ? ' active' : ''; // good enough for navbar purposes where only top level visible

                if (isset($item['children'])) {
                    //NB removing data-toggle="dropdown" from the <a> element allows link to be followed
                    $attributes = empty($item['attributes']) ? ' class="dropdown-toggle"'.$data_toggle : ' class="dropdown-toggle"'.$data_toggle.$item['attributes'];
                    $link = '<li class="dropdown' . $classes . '"><a href="'.base_url($item['location']).'"'.$attributes.'>'. $item['label'].' <b class="caret"></b></a>';
                    if (is_array($item['children'])) {

                        $sublist = '';
                        $sub_container_start = '<ul class="dropdown-menu">';
                        $sub_container_end = $container_end;
                        foreach ($item['children'] as $sub_item) {
                            $sublist .= '<li>' . anchor($sub_item['location'], $sub_item['label'], $sub_item['attributes']) . '</li>';
                        }
                        $sublist = $sub_container_start . $sublist . $sub_container_end;
                        $link .= $sublist . '</li>';
                    }
                } else {
                    $link = '<li class="' . trim($classes) . '">' . anchor($item['location'], $item['label'], $item['attributes']) . '</li>';
                }
                $list .= $link;                
                $counter++;
            }
        }
        return $container_start . $list . $container_end;
    } else {
        return '<!-- no menu data -->';
    }
}

/**
* Usage
*/
<?php echo bootstrap_menu(array('container_tag_id' => 'main-nav'), 'right', FALSE); // last arg switches toggle behaviour for drop-downs ?>

/**
* CSS 
* Hover on navbar - over-rides stock navbar behaviour
*/
ul.nav li.dropdown:hover > ul.dropdown-menu { display: block; }
/* & when menu collapsed */
.in ul.nav li.dropdown:hover > ul.dropdown-menu {
    position:relative;  
    width:100%;
    clear:both;    
    height:auto;
    float:none;
    margin-bottom:0;
    }
.in ul.nav li.dropdown:hover > ul.dropdown-menu a {font-size:0.9em; padding-left:2em}  
.navbar li:hover,
    .dropdown-menu > li > a:hover, 
        .dropdown-menu > li > a:focus {background: #ECECEC; color:#fff;} 
.navbar li:hover > .dropdown-menu {background: #ECECEC;}
.dropdown-menu, .navbar li.active:hover .dropdown-menu {border-top:0; box-shadow: none; background: #EEEEEE; border-color:#EEEEEE;}