JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/ui-lightness/jquery-ui.css">
<div id='start'>
    <div>content</div>
    <div>content
        <div>content</div>
        <div>content</div>
        <div>content</div>
    </div>
    <div>content
        <div>content</div>
        <div>content
            <div>content</div>
            <div>content</div>
            <div>content
                <div>not this one</div>
                <div>not this one</div>
                <div>not this one</div>
            </div>
        </div>
        <div>content</div>
    </div>
</div>

CSS

div > div {
    padding-left:16px;
}

JavaScript

$('#start > * > * > *').prepend('*');