http://foundation.zurb.com/docs/components/reveal.html

```html
<div id="myModal" class="reveal-modal" data-reveal>
  <h2>Awesome. I have it.</h2>
  <p class="lead">Your couch.  It is mine.</p>
  <p>Im a cool paragraph that lives inside of an even cooler modal. Wins</p>
  <a class="close-reveal-modal">&#215;</a>
</div>
```

So, looks like this is default way in fondation :) to make close modal dialog button. I propose to stick on that for now.