OctoberCMS - 如何使可折叠列表默认仅在非移动设备上处于活动状态

我有一个OctoberCMS网站,我试图在可折叠列表中隐藏侧边栏,以便在移动设备上查看时,列表项将被折叠.当不在移动设备上时,我正在寻找它,如下例所示:

http://codepen.io/anon/pen/GoqPJj

代码如下:

    

        

            

                

                    
filter_dramaFirst
                    

                        
Lorem ipsum dolor sit amet.
                    
                
            
        
        

            This is the main page content. Here is some more content, and here is some even more content. It never seems to end as I add random text. Just one more sentence to make it a bit more complete.
        
    

有谁知道我如何编辑上面的例子来产生预期的结果？