Remove wrapping div from field type radios (Drupal 7)
The div.form-radios is set by the theme wrapper of the radios. Use this code to prevent the theme wrapper from adding the additional div:

function no_name_form($form, &amp;$form_submit) {
  $form['radios'] = array(
    '#type'    =&gt; 'radios',
    '#title'   =&gt;'Question text',
    '#options' =&gt; array(
        '1' =&gt; t('yes'),
        '0' =&gt; t('no')
    ),
    '#theme'   =&gt; 'no_name_radios',
    '#theme_wrappers' =&gt; array(),
  );
  return $form;
}