JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://malsup.github.com/jquery.corner.js"></script>
<div id="new-menu-upper">
<ul id="top-nav">
<li><a href="/t-topnavlink.aspx">menu item 1</a></li>
<li><a href="/t-topnavlink.aspx">menu item 2</a></li>
<li><a href="/t-topnavlink.aspx">menu item 3</a></li>
<li><a href="/t-topnavlink.aspx">menu item 4</a></li>
<li><a href="/t-topnavlink.aspx">menu item 5</a></li>
<li><a href="/t-topnavlink.aspx">menu item 6</a></li>
</ul>
</div>

CSS

div#new-menu-upper {
    border: 0 solid red;
    height: 40px;
    margin: 0 5px 10px;
    padding-top: 63px;
}
ul#top-nav li {
    background-image: url("http://i47.tinypic.com/21nqxjc.png");
    background-repeat: repeat;
    border-right: 2px solid lightgrey;
    float: left;
    height: 41px;
    width: 156px;
}
ul#top-nav li a {
    color: White;
    display: inline-block;
    font-family: Arial;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 1px;
    padding-left: 38px;
    padding-top: 12px;
    text-transform: uppercase;
}

JavaScript

$('ul#top-nav li:first').corner();