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/1.8.4/themes/ui-lightness/jquery-ui.css">
<ul>
    <li><a href="#">test 0</a></li>
    <li><a href="#">test 1</a></li>
    <li><a href="#">test 2</a></li>
    <li><a href="#">test 3</a></li>
    <li><a href="#">test 4</a></li>
    <li><a href="#">test 5</a></li>
    <li><a href="#">test 6</a></li>
</ul>
<hr>

JavaScript

var list = $('ul')
var newList = list[0].cloneNode();
list.children(':gt(3)').appendTo(newList);
$('body').append(newList)