$this->loadLayout();
        $breadCrumb = $this->getLayout()->getBlock('breadcrumbs'); //这是
        $breadCrumb->addCrumb('home', array(
            'label' => Mage::helper('catalog')->__('Home'),
            'title' => Mage::helper('catalog')->__('Go to Home Page'),
            'link'  => Mage::getBaseUrl(),
        ))->addCrumb('youhui', array(
            'label' => Mage::helper('catalog')->__('youhuihuodong'),
            'title' => Mage::helper('catalog')->__('youhuihuodong'),
            'link'  => $category->getId() ? Mage::getUrl('*/*') : NULL,
        ))
        ;