Following code shows a simple implementation of tabs using Bootstrap having three tabs and contents respectively:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Tabs</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h3>Bootstrap Tabs</h3>
<ul class="nav nav-tabs" >
<li class="active"><a href="#tab-menu-1" data-toggle="tab">Menu 1</a></li>
<li><a href="#tab-menu-2" data-toggle="tab">Menu 2</a></li>
<li><a href="#tab-menu-3" data-toggle="tab">Menu 3</a></li>
</ul>
<div class="tab-content" style="border: 1px solid #dddddd; margin-top: -1px; padding: 20px;">
<div class="tab-pane active" id="tab-menu-1" >Content 1</div>
<div class="tab-pane" id="tab-menu-2"> Content 2</div>
<div class="tab-pane" id="tab-menu-3">Content 3</div>
</div>
</div>
</body>
</html>
Notice active tab is used to show default content.