rubtsoff

<h2 class="line-title"><span>This is my title</span><hr /></h2>

.line-title {
    font-size: 20px;
    margin-bottom: 10px;
    padding-top: 1px; /* Allows for hr margin to start at top of h2 */
}

/* clearfix for floats */
.line-title:after {
    content: "";
    display: table;
    clear: both;
}

.line-title span {
    padding-right: 10px;
    float: left;
}

.line-title hr {
    border:1px solid #DDD;
    border-width: 1px 0 0 0;
    margin-top: 11px;
}