JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <ul id="Category" class="row list-inline">                
        <li>
            <a href="/products/Category/Cars">
                Cars
            </a>
        </li>
        <li>
            <a href="/products/Category/Cars%20Racer">
                Cars MVC
            </a>
        </li>
        <li>
            <a href="/products/Category/Bikes" class="active">
                Bikes
            </a>
        </li>
        <li>
            <a href="/products/Category/Rollers">
                Rollers
            </a>
        </li>                
        <li>
            <a href="/products/Category/Scooters">
                Scooters
            </a>
        </li>
    </ul>
</div>

CSS

.active {
    background-color: orange;
}