<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="panel btn-pref btn-group btn-group-justified " role="group" style="margin-top:10px;height:720px;wight:900px; background-color:#adc;" >
<center>
<div class="tab-content " style= "margin-top:10px; " >
<div class="tab-pane panel active" id="tab1" >
<h2> <br> ... Tab 1</h2>
</div>
<div class="tab-pane panel " id="tab2" >
<form role="form" class="form-inline" >
<h2> <br> ... Tab 2</h2>
</form>
</div>
<div class="tab-pane panel " id="tab3" >
<form role="form" class="form-inline" >
<h2> <br> ... Tab 3</h2>
</form>
</div>
<div class="tab-pane panel fade in " id="tab4" >
<form role="form" class="form-inline" >
<h2> <br> ... Tab 4</h2>
</form>
</div>
<div class="tab-pane panel fade in " id="tab5" >
<form role="form" class="form-inline">
<h2> <br> ... Tab 5</h2>
</form>
</div>
<div class="tab-pane panel fade in " id="tab6" >
<form role="form" class="form-inline">
<h2> <br> ... Tab 6</h2>
</form>
</div>