Check these out:
Show/hide markup
<div class="form-item">
    <fieldset class="bare">

        <legend class="label">Check these out:</legend>

        <div class="form-item-input">
            <input id="checkbox1" type="checkbox"><label for="checkbox1">Checkbox 1</label>
            <input id="checkbox2" type="checkbox"><label for="checkbox2">Checkbox 2</label>
        </div>

    </fieldset>
</div>