inline radios ?

This can handy to write a survey, where most radios are "yes/no", "1,2,3,4 ..." " red, green, yellow", etc

    case 'inline_radios':
      $real_field = array(
        '#prefix' => '<div class="container-inline">',
        '#type' => 'radios',
        '#title' => $field->title,
        '#default_value' =>  $value,
        '#options' => _forms_options($field->options),
        '#description' => $field->explanation,
        '#required' => $field->required,
        '#suffix' => '</div>'
      );
      break;