<div class="wrapper">
  <a href="#" data-title="Hover Me!">Hover Me!</a>
</div>

*,
*:before,
*:after{
  box-sizing: border-box;
}

.wrapper{
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

a{
  display: block;
  width: 200px;
  height: 40px;
  text-indent: -9999px;
  line-height: 40px;
  font-size: 18px;
  font-family: sans-serif;
  text-decoration: none;
  letter-spacing: 2px;
  text-align: center;
  position: relative;
  transform-style: preserve-3d;
  transition: all .35s;
}

a:before,
a:after{
  position: absolute;
  content: attr(data-title);
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  border: 2px solid #333;
  text-indent: 0;
  transition: all .35s;
}

a:before{
  color: #fff;
  background: #333;
  transform-origin: left;
  transform: translateX(0) rotateY(0deg);
}

a:after{
  color: #333;
  background: #fff;
  transform: translateX(-100%) rotateY(90deg);
  transform-origin: right;
}

a:hover:before{
  transform: translateX(100%) rotateY(90deg);
}

a:hover:after{
  transform: translateX(0) rotateY(0deg);
}