<!DOCTYPE html>
<html lang="en">
<head>
<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">
</head>
<body>
<div class="container">
<h2>Bootstrap Justified Button Group</h2>
<div class="btn-group btn-group-justified">
<a href="#" class="btn btn-primary">PHP</a>
<a href="#" class="btn btn-primary">JavaScript</a>
<a href="#" class="btn btn-primary">C</a>
</div>
</div>
</body>
</html>