<div class="radiobutton">
    <input type="radio" id="radio_1" name="radio">
    <label for="radio_1">Radiobutton 1</label>
</div>
<div class="radiobutton">
    <input type="radio" id="radio_2" name="radio">
    <label for="radio_2">Radiobutton 2</label>
</div>