adding custom/current class support menu items

hi all,

i am editing a custom made theme for a client that was built by another developer.

i’m trying to add custom classes via the Menu page but don’t think the theme has built in support. i can see the class=”” in the HTML with firebug, but it doesn’t appear. i also noticed there is no current class or parent class for drop down menus as seen in other themes.

below is the code from header.php and here is a link to the live site – http://www.epilase.com.au/

<div class="collapse navbar-collapse">
                      <ul class="nav navbar-nav">
                    <?php 	

                    $current_page =  $wp_query->queried_object->post_name;

                    $menu_name = 'primary-menu';
                    $locations = get_nav_menu_locations();

                    if ( ( $locations = get_nav_menu_locations() ) && isset( $locations[ $menu_name ] ) )
                        $menu = wp_get_nav_menu_object( $locations[ $menu_name ] );

                    $args = array(
                    'order'                  => 'ASC',
                    'orderby'                => 'menu_order',
                    'post_type'              => 'nav_menu_item',
                    'post_status'            => 'publish',
                    'output'                 => ARRAY_A,
                    'output_key'             => 'menu_order',
                    'nopaging'               => true,
                    'update_post_term_cache' => false);

                    $menu_items = wp_get_nav_menu_items($menu->term_id,$args);

                    $current_page =  "http://".$_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];

                    $count = 1;

                    $menus = array();
                    $sub_menus = array();

                    foreach($menu_items AS $menu)
                    {
                        if($menu->menu_item_parent == 0)
                            $menus[$menu->ID] = $menu;
                        else
                            $sub_menus[$menu->menu_item_parent][$menu->ID] = $menu;
                    }

                    $num_menu = count($menu_items);
                    foreach((array)$menus AS $key => $menu)
                    {
						$class = "";
						$extra = "";

                        if(count($sub_menus[$key]) > 0)
                        {

							$class = "dropdown";
							$extra = 'class="dropdown-toggle" data-toggle="dropdown"';

							?>
							<li class="<?= $class; ?>"><a <?= $extra; ?> href="#"><?= strtoupper($menu->title); ?></a>
							<ul class="dropdown-menu">
							<?

                            $count = 0;

                            foreach($sub_menus[$key] AS $sub_menu)
                            {
                                ?><li><a href="<?= $sub_menu->url; ?>"><?= strtoupper($sub_menu->title); ?></a></li><?

                                $count++;
                            }		

                            ?></ul><?
                        }
						else
						{
							?>
							<li class="<?= $class; ?><?= ($current_page == $menu->url) ? 'active' : ""; ?>"><a <?= $extra; ?> href="<?= $menu->url; ?>"><?= strtoupper($menu->title); ?></a>
							</li>
							<?
						}
                    }
                    ?>  

                      </ul>

                    </div><!-- /.navbar-collapse -->

any help would be much appreciated!

thanks