h6 {
    width: 70%;
    margin: .7em auto;
    overflow: hidden;
    text-align: center;
    color: #fff;
}
h6:before, h6:after {
    content: "";
    display: inline-block;
    width: 50%;
    margin: 0 .5em 0 -55%;
    vertical-align: middle;
    border-bottom: 1px solid;
}
h6:after {
    margin: 0 -55% 0 .5em;
}
span {
    display: inline-block;
    vertical-align: middle;
}