How to append li inside new div

Question

I have a HTML markup like this:

<ul>
    <li>Item 1</li>
    <li>Item 2</li>
    <li>Item 3</li>
    <li>Item 4</li>
    <li>Item 5</li>
    <li>Item 6</li>
    <li>Item 7</li>
    <li>Item 8</li>
</ul>

How can I convert above HTML into this:

<div class="main"><ul><li>Item 1</li><li>Item 2</li></ul></div>

<div class="main"><ul><li>Item 3</li><li>Item 4</li></ul></div>

<div class="main"><ul><li>Item 5</li><li>Item 6</li></ul></div>

<div class="main"><ul><li>Item 7</li><li>Item 8</li></ul></div>

Answer 1

You can do like this:

$('ul > li:nth-child(2n-1)').each(function() {
    $(this).next().add(this).wrapAll('<div class="main"><ul></ul></div>');
}).eq(0).closest('div').unwrap();

Working Demo