<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="navbar navbar-default">
<div class="container">
<div class="navbar-btn navbar-left btn-group">
<button type="button" id="btn-megamenu" class="btn btn-default">
<span class="glyphicon glyphicon-align-justify"></span>
<span class="nav-label">Menu</span>
</button>
</div>
<div class="navbar-btn navbar-right btn-group">
<button type="button" id="btn-options" class="btn btn-default btn-options">
<span class="glyphicon glyphicon-cog"></span>
<span class="nav-label">Preferences</span>
</button>
</div>
<form class="navbar-form">
<div class="form-group" style="display:inline;">
<div class="input-group" style="display:table;">
<span class="input-group-btn btn-block" style="width:1%;">
<button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown" >
<span class="glyphicon glyphicon-search"></span>
<span class="nav-label"> Search</span>
<span class="fa fa-caret-down"></span>
</button>
<ul id="search-option" class="dropdown-menu pull-left" role="menu">
<li>
