<div class="btn-group" data-toggle="buttons">
<label class="btn btn-primary active">
<input type="checkbox" autocomplete="off" checked> Checkbox 1 (pre-checked)
</label>
<label class="btn btn-primary">
<input type="checkbox" autocomplete="off"> Checkbox 2
</label>
<label class="btn btn-primary">
<input type="checkbox" autocomplete="off"> Checkbox 3
</label>
</div>