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<button type="button" class="navbar-toggle" data-toggle="nav-left" data-target="#nav-left">
 <span class="icon-bar"></span>
 <span class="icon-bar"></span>
 <span class="icon-bar"></span>
</button>
<div class="nav-left" id="nav-left">
</div>
<script>
 jQuery(document).ready(function(){
 $("[data-toggle="nav-left"]").click(function(){
 $('.nav-left').toggleClass("active");
 });
 });
</script>