$('.checkbox').each(function(){

		if($(this).attr('checked') == true){
				$(this).prev('input').val('1');
			}else{
				$(this).prev('input').val('0');
			}

	});

I override the loadDefaultDecorators for the Zend_Form_Element_Hidden which gives the opportunity to add the class directly when the hidden elements are added (and not only when rendered).

Because it’s too long to post the whole story, here’s just the link to my blog post:
http://juriansluiman.nl/en/blog/article/106/hide-hidden-zend_form-elements

I too like to get my pages validated.

Thanks

->removeDecorator('label')
->removeDecorator('HtmlTag');

… stacked and it works, for hidden and hash elements.

I don’t care if it does not validate.

class Zend_View_Helper_StripHidden {
    public function stripHidden( Zend_Form $_form ) {
        foreach( $_form->getElements() as $element ) {
            if( $element instanceof Zend_Form_Element_Hidden ) {
				$element->setDecorators(array(
				    'ViewHelper',
				    array('HtmlTag', array('tag' => 'dd', 'class' =>'hidden')),
				));
            }
        }

        return $_form;
    }
}