JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.js"></script>
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/themes/ui-lightness/jquery-ui.css">
<div>
    text
    <p>a paragraph</p>
    more text
</div>

JavaScript

$('div').contents().map(function() {
    if(this.nodeType == 3) {
        $(this).replaceWith('<b>some bold text</b>');
    }
});