用JS 吧 我这有快代码你瞅瞅，或许有用
main 是右侧内容块
#list_left是左侧菜单
closeMenu>span 是点击按钮
var moveLeft = $("#list_left").width();
$(".main").css({marginLeft:moveLeft});
var isShow = true;
$(".closeMenu span").click(function(){
$(this).hide().siblings().show();
if(isShow){
$("#list_left").animate({
marginLeft : - (moveLeft-15)
},200,"linear",function(){
isShow = false;
$(".closeMenu > span").css({
opacity:1
});
});
$(".main").animate({margin:"0 auto",marginLeft:15},"linear");
}else{
$("#list_left").animate({
marginLeft : 0
},200,"linear",function(){
isShow = true;
});
$(".main").animate({marginLeft:moveLeft},"linear");
}
});