CSS3 平分

.wrap {
    width: 100%;
    height: 50px;
    display: -moz-box;
    display: -webkit-box;
    display: box;
    line-height: 50px;

}

.wrap a {
    -moz-box-flex: 1;
    -webkit-box-flex: 1;
    box-flex: 1;
    border-right: 1px solid #ccc;
    text-align: center;
    display: block;
    color: #474747;
    text-decoration: none;

}