<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> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <div class="container"> <div class="inner first">Hello</div> <div class="inner second">And</div> <div class="inner third">Goodbye</div> </div> <h3>Only heading change</h3> </div> </div>

$(document).ready(function(){ $( "div.second" ).replaceWith( "<h2>New heading</h2>" ); $( "h3" ).replaceWith( "<h1>Only heading change</h1>" ); });