Bootstrap tree

Bootstrap-styled tree widget

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css">
<script src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/js/bootstrap.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css">
<div class="tree well">
    <ul>
        <li>
            <span><i class="icon-folder-open"></i> Parent</span> <a href="" class="add_trigger">Add</a>&nbsp;&nbsp;<a href="" class="delete_trigger">Delete</a>
            <ul>
                <li>
                	<span><i class="icon-minus-sign"></i> Child</span> <a href="" class="add_trigger">Add</a>&nbsp;&nbsp;<a href="" class="delete_trigger">Delete</a>
                    <ul>
                        <li>
	                        <span><i class="icon-leaf"></i> Grand Child</span> <a href="" class="add_trigger">Add</a>&nbsp;&nbsp;<a href="" class="delete_trigger">Delete</a>
                        </li>
                    </ul>
                </li>
                <li>
                	<span><i class="icon-minus-sign"></i> Child</span> <a href="" class="add_trigger">Add</a>&nbsp;&nbsp;<a href="" class="delete_trigger">Delete</a>
                    <ul>
                        <li>
	                        <span><i class="icon-leaf"></i> Grand Child</span> <a href="" class="add_trigger">Add</a>&nbsp;&nbsp;<a href="" class="delete_trigger">Delete</a>
                        </li>
                        <li>
                        	<span><i class="icon-minus-sign"></i> Grand Child</span> <a href="" class="add_trigger">Add</a>&nbsp;&nbsp;<a href="" class="delete_trigger">Delete</a>
                            <ul>
                                <li>
	                                <span><i class="icon-minus-sign"></i> Great Grand Child</span> <a href="" class="add_trigger">Add</a>&nbsp;&nbsp;<a href=""...

CSS

.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
}

JavaScript

$(function () {
    $('.tree li:has(ul)').addClass('parent_li').find(' > span').attr('title', 'Collapse this branch');
    $('.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', 'Expand this branch').find(' > i').addClass('icon-plus-sign').removeClass('icon-minus-sign');
        } else {
            children.show('fast');
            $(this).attr('title', 'Collapse this branch').find(' > i').addClass('icon-minus-sign').removeClass('icon-plus-sign');
        }
        e.stopPropagation();
    });
    $('.tree ul').sortable({
        placeholder: "ui-state-highlight",
    }).disableSelection();
    $(document).on('click','.delete_trigger', function(e){
        $(this).parent().remove();
        e.stopPropagation();
        return false;
    });
    $(document).on('click','.add_trigger', function(e){
        parent_li = $(this).parent()
        ul = parent_li.find(' > ul');
        console.log(ul);
        if(ul.length == 0){
            ul = $('<ul/>').appendTo(parent_li);
            parent_li.addClass('parent_li')
        }
        $('<li/>').append(
            $('<span/>').append(
                $('<input/>',{'type':'text'})
            ).append(
                $('<a/>',{'class':'icon-plus-sign do-add'})
            )
        ).appendTo(ul);
        $(ul).sortable({
            placeholder: "ui-state-highlight",
        }).disableSelection();
        e.stopPropagation();
        return false;
    });
    
    $(document).on('click','.do-add',function(){
        value = $(this).prev().val();
        //$(this).parent().empty();
        $(this).parent().empty().text(' ' + value).prepend(
            $('<i/>', {'class':'icon-leaf'})
        ).after(
            $('<a/>',{'class':'delete_trigger'}).text('Delete')
        ).after(
           ...