orly?

simple_form_checbox.html

<div class="control-group boolean optional">
    <label class="boolean optional control-label" for="user_remember_me">Remember me</label>
    <div class="controls">
        <input name="user[remember_me]" type="hidden" value="0">
        <label class="checkbox">
            <input class="boolean optional" id="user_remember_me" name="user[remember_me]" type="checkbox" value="1">
        </label>
    </div>
</div>