<div class="tree well"><ul><li><span><iclass="glyphicon glyphicon-folder-open"></i> Parent</span> <ahref="">Goes somewhere</a><ul><li><span><i class="glyphicon glyphicon-minus"></i>Child</span><a href="">Goes somewhere</a><ul><li><span><i class="glyphicon glyphicon-leaf"></i>Grand Child</span> <a href="">Goes somewhere</a></li></ul></li></ul></li><li><span><i class="icon-folder-open"></i> Parent2</span> <ahref="">Goes somewhere</a><ul><li><span><i class="icon-leaf"></i> Child</span> <ahref="">Goes somewhere</a></li></ul></li></ul></div>

.tree {min-height:20px;padding:19px;margin-bottom:20px;background-color:#fbfbfb;border:1px solid #999;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;-webkit-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);-moz-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05)
}
.tree li {list-style-type:none;margin:0;padding:10px 5px 0 5px;position:relative
}
.tree li::before, .tree li::after {content:'';left:-20px;position:absolute;right:auto
}
.tree li::before {border-left:1px solid #999;bottom:50px;height:100%;top:0;width:1px
}
.tree li::after {border-top:1px solid #999;height:20px;top:25px;width:25px
}
.tree li span {-moz-border-radius:5px;-webkit-border-radius:5px;border:1px solid #999;border-radius:5px;display:inline-block;padding:3px 8px;text-decoration:none
}
.tree li.parent_li>span {cursor:pointer
}
.tree>ul>li::before, .tree>ul>li::after {border:0
}
.tree li:last-child::before {height:30px
}
.tree li.parent_li>span:hover, .tree li.parent_li>span:hover+ul li span {background:#eee;border:1px solid #94a0b4;color:#000
}

$(function() {$('.tree li:has(ul)').addClass('parent_li').find(' > span').attr('title','点击收缩');$('.tree li.parent_li > span').on('click',function(e) {var children = $(this).parent('li.parent_li').find(' > ul > li');if (children.is(":visible")) {children.hide('fast');$(this).attr('title', '点击展开').find(' > i').addClass('glyphicon-plus').removeClass('glyphicon-minus');} else {children.show('fast');$(this).attr('title', '点击收缩').find(' > i').addClass('glyphicon-minus').removeClass('glyphicon-plus');}e.stopPropagation();});
});