資訊軌跡

Bootstrap 2還有3層選單，3版就拿掉了，猜測可能是因為拉到第三層太多吧

不過可能某些客戶就是要...所以找到了這個解決方案分享給大家

廢話不多說，直接上圖和範例

相關程式碼範例請參考這裡

http://www.bootply.com/97919

====== CSS ======

.marginBottom-0 {margin-bottom:0;}

.dropdown-submenu{position:relative;}
.dropdown-submenu>.dropdown-menu{top:0;left:100%;margin-top:-6px;margin-left:-1px;-webkit-border-radius:0 6px 6px 6px;-moz-border-radius:0 6px 6px 6px;border-radius:0 6px 6px 6px;}
.dropdown-submenu>a:after{display:block;content:" ";float:right;width:0;height:0;border-color:transparent;border-style:solid;border-width:5px 0 5px 5px;border-left-color:#cccccc;margin-top:5px;margin-right:-10px;}
.dropdown-submenu:hover>a:after{border-left-color:#555;}
.dropdown-submenu.pull-left{float:none;}.dropdown-submenu.pull-left>.dropdown-menu{left:-100%;margin-left:10px;-webkit-border-radius:6px 0 6px 6px;-moz-border-radius:6px 0 6px 6px;border-radius:6px 0 6px 6px;}

====== CSS======

====== javascript======

(function($){
    $(document).ready(function(){
        $('ul.dropdown-menu [data-toggle=dropdown]').on('click', function(event) {
            event.preventDefault();
            event.stopPropagation();
            $(this).parent().siblings().removeClass('open');
            $(this).parent().toggleClass('open');
        });
    });
})(jQuery);

====== javascript======

====== html ======

====== html ======