进行了以下更改：

Made the following changes:

ul li a img{
    display:block;
}


a {
    color: #000;
    font-weight: 700;
    text-decoration: none;
    display:table-cell;
    vertical-align: middle;
    width:100px;
    height:80px;
}

http://jsfiddle.net/qvuCm/12/