I want to extend the FormHelper and used this part of a method's code to be called in the view.
$out = parent::input($fieldName, $opts);
return parent::output($out);
Error: Call to a member function useTag() on a non-object File: ...lib/Cake/View/Helper/FormHelper.php Line: 861
The label method :
return $this->Html->useTag('label', $labelFor, $options, $text);
CakePHP version 2.5.1
I had the same issue, and I finally figured out the answer.
Make sure you are including the HtmlHelper in yours.
public $helpers = array('Html');
Thanks to Holt59's "CakePHP 2.x Helpers for Bootstrap 3" code, where I found the answer.