HTML format

<div class="portfolio-item cat1 cat3 ">
    <div class="thumb">
        <a href="img/portfolio/01.jpg" class="popup-link" title="lightbox view">
            <img src="img/portfolio/01.jpg" alt="">
            <div class="portfolio-hover">
                <div class="portfolio-description">
                    <h4>lightbox view</h4>
                    <p>category</p>
                </div>
            </div>
        </a>
    </div>
</div>