<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<nav class="navbar navbar-expand-lg navbar-dark bg-primary">
<a class="navbar-brand" href="#">Customer Manager</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="nav navbar-nav menu">
<li class="nav-item">
<a class="nav-link active" href="#.">Customers <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#.">Orders</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#.">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#.">Login</a>
</li>
</ul>
</div>
</nav>
<div class="container-fluid">
<div class="row-fluid">
<div class="col-md-12">
<h2><i class="glyphicon glyphicon-user"></i> Customers </h2>
</div>
<div class="col-md-12">
<nav aria-label="breadcrumb">
<ol class="breadcrumb">
<li class="breadcrumb-item"><a href="#">Home</a></li>
