<{foreach from=$element->getOptions() key=value item=name}>
  <label><input type='radio' name='<{$element->getName()}>' value='<{$value}>' <{if $element->getValue() !== null && $element->getValue() == $value}> checked='checked'<{/if}> <{$element->getExtra()}> /><{$name}></label>
<{/foreach}>
