JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="categories" class="sections"> 
    <li> <a href="#">Section</a> 
        <ul> 
            <li> <a href="#">kategori</a> </li> 
        </ul> 
    </li> 
    <li> <a href="#">Section</a> 
        <ul> 
            <li> <a href="#">kategori</a> </li> 
            <li> <a href="#">kategori</a> </li> 
        </ul>
    </li>
</ul>

CSS

#categories li {    
    padding: 14px 0;
    font-size: 12px;
    width: 280px;
    text-transform: uppercase;
    font-weight: normal;
    background-color: #ffffff;
    background-image: url("../graphics/open.png");
    background-repeat: no-repeat;
    background-position: 240px center;
    border-bottom: 1px solid #f3f3f3;
}

#categories li:hover {    
    background-color: #dadada;    
}

#categories li a {
    padding-left: 20px;
    white-space: nowrap;
    text-overflow: ellipsis;
}

#categories ul {
    display: none;
}

#categories ul.selected {
    display: block;
}

.sections ul li .selected ul {    
    line-height: 34px;
    font-size: 12px;
    text-transform: uppercase;
    font-weight: normal;
    background-color: #ffffff;
    background-image: url("../graphics/close.png");
    background-repeat: no-repeat;
    background-position: 240px center;
}

.sections li {
    background-color: #ffffff;    
}

.sections li a:hover {
    text-decoration: none;
}

JavaScript

$(document).ready(function(){
    $('#categories li').click(function() {
        $(this).find('ul').toggleClass('selected'); 
        return false; 
    });
});