tab.css

@import url('http://getbootstrap.com/2.3.2/assets/css/bootstrap.css');

.container, .tabbable {
    border: 1px solid #34495E;
    padding: 10px;
    background: #FFF;
    margin-top: 30px;
}

.nav-tabs > li {
    position:relative;    
}

.nav-tabs > li > a {
    display:inline-block;
}

.nav-tabs > li > span {
    display:none;
    cursor:pointer;
    position:absolute;
    right: 6px;
    top: 8px;
    color: red;
}

.nav-tabs > li:hover > span {
    display: inline-block;
}