You need to number the accordion i.e. accordion1 accordion2 accordion3
<div class="row">
<div class="col-sm-6 col-md-4">
<div class="panel-group">
<div class="panel panel-default">
<a class="panel-default" data-toggle="collapse" data-parent="#accordion1" href="#collapseOne">
<div class="panel-heading">
<h4 class="panel-title">
My Story
</h4>
</div>
</a>
<div id="collapseOne" class="panel-collapse collapse">
<div class="panel-body">
Content
</div>
</div>
</div>
</div>
</div>
<div class="col-sm-6 col-md-4">
<div class="panel-group" id="accordion">
<div class="panel panel-default">
<a class="panel-default" data-toggle="collapse" data-parent="#accordion2" href="#collapseTwo">
<div class="panel-heading">
<h4 class="panel-title">
My Skills
</h4>
</div>
</a>
<div id="collapseTwo" class="panel-collapse collapse in">
<div class="panel-body">
Content
</div>
</div>
</div>
</div>
</div>
<div class="col-sm-6 col-md-4">
<div class="panel-group" id="accordion">
<div class="panel panel-default">
<a class="panel-default" data-toggle="collapse" data-parent="#accordion3" href="#collapseThree">
<div class="panel-heading">
<h4 class="panel-title">
My Ambition
</h4>
</div>
</a>
<div id="collapseThree" class="panel-collapse collapse">
<div class="panel-body">
content
</div>
</div>
</div>
</div>
</div>
</div>