Edit in JSFiddle

<ul class="nav nav-tabs" data-activable data-trigger=">:first-child">
  <li class="active"><a href="#tab1">Tab1</a></li>
  <li class=""><a href="#tab2">Tab2</a></li>
  <li class=""><a href="#tab3">Tab3</a></li>
</ul>
<div class="tab-content">
  <div class="tab-pane active" id="tab1">
    Raw denim you probably haven't heard of them jean shorts Austin.
    Nesciunt tofu stumptown aliqua, retro synth master cleanse.
  </div>
  <div class="tab-pane" id="tab2">
    Mustache cliche tempor, williamsburg carles vegan helvetica.
    Reprehenderit butcher retro keffiyeh dreamcatcher synth.
  </div>
  <div class="tab-pane" id="tab3">
    Cosby sweater eu banh mi, qui irure terry richardson ex squid.
    Aliquip placeat salvia cillum iphone.
  </div>
</div>

body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 13px;
  line-height: 18px;
  color: #333333;
  background-color: #ffffff;
}

a {
  color: #0088cc;
  text-decoration: none;
}

a:hover {
  color: #005580;
  text-decoration: underline;
  outline: none;
}

ul {
  margin-bottom: 18px;
  margin-left: 0;
  list-style: none;
  border-bottom: 1px solid #ddd;
}

ul:before, ul:after {
  display: table;
  content: "";
}

ul:after {
  clear: both;
}

.nav-tabs:after,
.nav-pills:after {
  clear: both;
}

ul > li {
  float: left;
  margin-bottom: -1px;
}

ul > li > a {
  display: block;
  padding-right: 12px;
  padding-left: 12px;
  margin-right: 2px;
  padding-top: 8px;
  padding-bottom: 8px;
  line-height: 18px;
  border: 1px solid transparent;
  -webkit-border-radius: 4px 4px 0 0;
     -moz-border-radius: 4px 4px 0 0;
          border-radius: 4px 4px 0 0;
}

ul > li > a:hover {
  background-color: #eeeeee;
  border-color: #eeeeee #eeeeee #dddddd;
  text-decoration: none;
}

ul > .active > a,
ul > .active > a:hover {
  color: #555555;
  cursor: default;
  background-color: #ffffff;
  border: 1px solid #ddd;
  border-bottom-color: transparent;
}

div > div {
  display: none;
}

div > .active {
  display: block;
}