JSFiddle - React, Tailwind, and code Playground

HTML

<div id="galleria">
     <div class="images"><a class="www.google.com" href="bens_img/1.jpg"><img src="bens_img/thumb1.jpg"></a></div>
     <div class="images"><a class="www.yahoo.com" href="bens_img/2.jpg"><img src="bens_img/thumb2.jpg"></a></div>
     <div class="images"><a class="www.tokyo.co.jp" href="bens_img/3.jpg"><img src="bens_img/thumb3.jpg"></a></div>
</div>

JavaScript

$(document).ready(function() {
    $('#galleria div.images a').each(function(){
       $(this).attr("href", "http://" + $(this).attr('class'));
    });
});