JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/themes/ui-lightness/jquery-ui.css">
<dl>
    <dt>Items:</dt>
    <dd>
        <ul>
            <li>Item 1<div class="item-info">...</div></li>
            <li>Item 2<div class="item-info">...</div></li>
            <li>Item 3<div class="item-info">...</div></li>
        </ul>
        <ul>
            <li>Item 1<div class="item-info">...</div></li>
            <li>Item 2<div class="item-info">...</div></li>
            <li>Item 3<div class="item-info">...</div></li>
        </ul>
    </dd>
</dl>

JavaScript

var $items = $('.item-info');   
var total = $items.length;      
var parent;                   

$items.first()
    .parents()
    .each(function() {
        if($(this).find('.item-info').length == total) {
            parent = this;
            return false;
        }
    });

alert(parent.tagName);