在控制器的PostDispatch方法中设置一个View变量

class Your_Class extends Zend_Controller_Plugin_Abstract
{
    public function postDispatch(Zend_Controller_Request_Abstract $request)
    {
        $layout = Zend_Layout::getMvcInstance();
        $view = $layout->getView();
        $view->variable = 'some value';
    }
}