css triangle for bootstrap left nav

by niki4810

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css">
<div class="container-fluid">
    <div class="row-fluid">
        <!-- Left Nav -->
        <div class="span3 group">
            <div class="pull-left">
                <ul class="nav nav-stacked nav-tabs">
                    <li> <a href="#">Home</a>
                    </li>
                    <li class="active"><a href="#">About</a>
                    </li>
                    <li><a href="#">Contact</a>
                    </li>
                </ul>
            </div>
            <div class="pull-left"> <a href="#">=</a>

            </div>
        </div>
        <!-- Main Content -->
        <div class="span9">
            <div class="hero-unit">
                 <h1>Hello, world!</h1>

                <p>This is a template for a simple marketing or informational website. It includes a large callout called the hero unit and three supporting pieces of content. Use it as a starting point to create something more unique.</p>
                <p><a href="#" class="btn btn-primary btn-large">Learn more &raquo;</a>

                </p>
            </div>
        </div>
    </div>
</div>

CSS

body {
    padding : 5px;
    /* background-color: #ccc;*/
}
.nav-tabs > .active > a, .nav-tabs > .active > a:hover {
    color: #ffffff;
    background-color:#1b4860;
}
/*
.nav > li.active:before {
    content :"";
    float:right;
    margin-top :10px;
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right:10px solid #fff;
}*/
 .span3 ul, .span3 a {
    float:left
}
/*clear fix*/
 .group:before, .group:after {
    content:"";
    display: table;
}
.group:after {
    clear: both;
}
.group {
    zoom: 1;
    /* For IE 6/7 (trigger hasLayout) */
}