JSFiddle - React, Tailwind, and code Playground

HTML

<div id="cat_icon">Menu</div>
<div id="categories">
    <div CLASS="panel_title">Inner Menu</div>
    <div CLASS="panel_item">
        <template:UserControl id="ucCategories" src="UserControls/ProductCategories.ascx" />
    </div>
</div>

CSS

#categories {
    display: none;
    border : 1px solid #000;
    width: 200px;
}

JavaScript

$('#cat_icon,.panel_title').click(function () {
    $('#categories,#cat_icon').stop().slideToggle('slow');
});