Zend_Navigation - set menu item to visible in controller?

Question

Zend_Navigation question

I want a menu item to only be visible if certain conditions apply. So initially in my nav.xml I have

   <item_one>...<visible>0</visible></item_one>

Is it possible to set item_one to visible in controller->init() if a condition is met?

Answer 1

$this->view->navigation()->findBy('property_name','value')->setVisible(true);