Display Zend_Form_Element_Radio on one line ?

Answer

<?php     

class CustomForm extends Zend_Form
{
  public function init()
  {
    $this->setMethod('post');
    $this->setAction('user/process');
    $gender = new Zend_Form_Element_Radio('gender');
    $gender->setLabel('Gender:')
      ->addMultiOptions(array(
        'male' => 'Male',
        'female' => 'Female'
      ))
      ->setSeparator('');
  }
}