Sorry for late reply.
I am trying to get the img tag something like this
<div class="new-class">
<a href="url">
<img class="alignnone size-full wp-image-61319 image-border" alt="3" src="image.jpg" width="1564" height="1144" title="" />
</a>
</div>
How can achieve this without editing source code as you say ?