<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="form-group">
<div class="input-group">
<span class="input-group-addon">
<input type="text" value="" class="form-control" name="custom_name" placeholder="custompath">
</span>
<span class="input-group-addon">
<input type="text" value="" class="form-control" name="custom_name" placeholder="custompath">
</span>
<span class="input-group-addon">
<button class="add btn btn-primary" type="button" data-bind="click: addKeyValue">Add</button>
</span>
</div>
</div>
