ZendFramework - How to create optgroup and there option using view helpers?

Answer 1

For the Zend_Form_Element_Select() it goes like this

$multiOptions = array(
  'Group A' => array(1 => 'First Value',2 => 'Second Value A),
  'Group B' => array(3 => 'Third Value'),
);

$element->setMultiOptions($multiOptions);

Note that you also have addMultiOption($option,$value) and addMultiOptions($options). Simply include the value or options in an additional array.