<div class="row" id="top-b">
<div class="col-xs-15 text-center" id="top-1" style="margin-bottom:5px"></div>
<div class="col-xs-15 text-center" id="top-2" style="margin-bottom:5px"></div>
<div class="col-xs-6 text-center" id="top-3" style="margin-bottom:5px"></div>
<div class="col-xs-6 text-center" id="top-4" style="margin-bottom:5px"></div>
<div class="col-xs-6 text-center" id="top-5" style="margin-bottom:5px"></div>
<div class="col-xs-6 text-center" id="top-6" style="margin-bottom:5px"></div>
<div class="col-xs-6 text-center" id="top-7" style="margin-bottom:5px"></div>
</div>