Edit in JSFiddle

ul
{
    /* OPTIONAL STYLES */
    list-style: none;
    margin: 0;
    padding :0;
    font-size: 0;
}
li
{
    /* REQUIRED STYLES */
    position: relative;
    background: red;
    /* OPTIONAL STYLES */
    display: inline-block;
    width: 100px;
    height: 30px;
}
li a
{
    /* REQUIRED STYLES */
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 999;
    /* OPTIONAL STYLES */
    display: inline-block;
    text-align: center;
    line-height: 30px;
    color: #fff;
    font-family: 'Hevletica Neue', Helvetica, Arial, Verdana, sans-serif;
    font-size: 12px;
}
li span
{
    /* REQUIRED STYLES */
    position: relative;
    display: block;
    background: black;
    -webkit-transition: all 280ms ease;
    -moz-transition: all 280ms ease;
    -o-transition: all 280ms ease;
    transition: all 280ms ease;
    /* OPTIONAL STYLES */
    height: 30px;
    color: #fff;
}
li:hover span
{
    /* REQUIRED STYLES */
    -webkit-transition: all 280ms ease;
    -moz-transition: all 280ms ease;
    -o-transition: all 280ms ease;
    transition: all 280ms ease;
    /* OPTIONAL STYLES */
    top: -30px;
}

<ul>
    <li><a href="/home">Home</a><span></span></li>
    <li><a href="/media">Media</a><span></span></li>
    <li><a href="/news">News</a><span></span></li>
    <li><a href="/about">About</a><span></span></li>
</ul>