如果要修改html标记并更改菜单标题，可以创建自己的walker_nav 分类如下。在这里，我放置了fontawesome图标fa-home 的图标Home 下拉菜单前的菜单和更多图标。

class Sunrise_Universal_Walker_Nav_Primary extends Walker_Nav_menu {

    function start_lvl( &$output, $depth = 0, $args = array() ){ //ul
        $indent = str_repeat("\\t",$depth);
        $submenu = ($depth > 0) ? \' sub-menu\' : \'\';
        $output .= "\\n$indent<ul class=\\"dropdown-menu $submenu depth_$depth\\">\\n";
    }

    function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ){ //li a span

        $indent = ( $depth ) ? str_repeat("\\t",$depth) : \'\';

        $li_attributes = \'\';
        $class_names = $value = \'\';

        // look you can put home icon for home page  and what not
        if($item->title == \'Home\'){
            $item->title = \'<span class="fa fa-home"></span>\';
        }


        $classes = empty( $item->classes ) ? array() : (array) $item->classes;
        /*echo "<pre>";
        var_dump($item);
        die();*/
        $classes[] = ($args->walker->has_children) ? \'dropdown\' : \'\';
        $classes[] = ($item->current || $item->current_item_ancestor) ? \'active\' : \'\';
        $classes[] = \'menu-item-\' . $item->ID;
        if( $depth && $args->walker->has_children ){
            $classes[] = \'dropdown-submenu\';
        }
        $numbers[] = get_post_meta($item->ID,\'_menu_item_object_id\',true);

        //here i use the glyphicon for the menus of dropdown 

        $glyphicon= \'\';
        foreach ($numbers as $number) {
            if(in_category("services",$number)){
                $glyphicon = get_post_meta($number,"glyphicon",true);
            }
        }
        $class_names =  join(\' \', apply_filters(\'nav_menu_css_class\', array_filter( $classes ), $item, $args ) );
        $class_names = \' class="\' . esc_attr($class_names) . \'"\';

        $id = apply_filters(\'nav_menu_item_id\', \'menu-item-\'.$item->ID, $item, $args);
        $id = strlen( $id ) ? \' id="\' . esc_attr( $id ) . \'"\' : \'\';

        $output .= $indent . \'<li\' . $id . $value . $class_names . $li_attributes . \'>\';

        $attributes = ! empty( $item->attr_title ) ? \' title="\' . esc_attr($item->attr_title) . \'"\' : \'\';
        $attributes .= ! empty( $item->target ) ? \' target="\' . esc_attr($item->target) . \'"\' : \'\';
        $attributes .= ! empty( $item->xfn ) ? \' rel="\' . esc_attr($item->xfn) . \'"\' : \'\';
        $attributes .= ! empty( $item->url ) ? \' href="\' . esc_attr($item->url) . \'"\' : \'\';


    $attributes .= \'class="dropdown-toggle"\';
            $attributes .= ( $args->walker->has_children ) ? \' class="dropdown-toggle drop-down full-width hover-fade" data-toggle="dropdown"\' : \'\';

            $item_output = $args->before;
//glyhicons are here 

            $item_output .= \'<a\' . $attributes . \'><span class="glyphicons \'.$glyphicon.\'"></span>\';
            $item_output .= $args->link_before . apply_filters( \'the_title\', $item->title, $item->ID ) . $args->link_after;
            $item_output .= ( $depth == 0 && $args->walker->has_children ) ? \' <b class="caret"></b></a>\' : \'</a>\';
            $item_output .= $args->after;

            $output .= apply_filters ( \'walker_nav_menu_start_el\', $item_output, $item, $depth, $args );

    }

}

<nav class="navbar collapse navbar-collapse  navbar-sunshine" id="navbar-collapse-1">

      <?php  wp_nav_menu( array(\'menu\' => \'Main\', \'theme_location\' => \'Primary\',\'container\' => \'\', \'items_wrap\' => \'<ul class="nav navbar-nav" id="main-menu">%3$s</ul>\' , \'walker\' => new Sunrise_Universal_Walker_Nav_Primary())); ?>                        
</nav>

add_filter( \'wp_nav_menu_items\', \'your_custom_menu_item\', 10, 2 );
function your_custom_menu_item ( $items, $args ) {

    preg_match_all(\'~>\\K[^<>]*(?=</a)~\', $items, $matches);
    $return = $items;
    foreach ($matches[0] as $match) {

        $return = preg_replace(\'@\'.$match.\'@\', $match.\' -\', $return);

    }
    return $return;
}