magento 获取无限级分类（通过parentId） 1

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magento 获取无限级分类（通过parentId）

public function getCategoryHtml($categoryId = '', $layer = '', $store_id = null){ 
        $store_id = $store_id == null ? Mage::app()->getStore()->getId() : $store_id; 
        $categoryM = Mage::getModel('catalog/category'); 
        $categoryC = $categoryM->getCollection(); 
    
        foreach ($categoryC as $category) { 
            $M = Mage::getModel('catalog/category')->setStoreId($store_id)->load($category->getEntityId()); 
            $categoryData[$M->getEntityId()]['id']   = $M->getEntityId(); 
            $categoryData[$M->getEntityId()]['name'] = $M->getName(); 
            $categoryData[$M->getEntityId()]['path'] = explode('/', $M->getPath()); 
        } 
        sort($categoryData); 
        //print_r($categoryData); 
        $categoryTree = $this->getChild($categoryId,$layer-1, $categoryData); 
        return $categoryTree; 
    } 
    
    public function getChild($parentId,$layer,$categoryData){ 
    
        $parentId = $parentId?$parentId:1; 
                
        $html .= '<ul>'; 
        $categoryThisLevel = array(); 
                
        for ($i = 0; $i < count($categoryData); $i++) { 
            for ($j = 0; $j < count($categoryData[$i]['path']); $j++) { 
                if($categoryData[$i]['path'][$j] == $parentId){ 
                    if($j+2 == count($categoryData[$i]['path'])){ 
                        $category = Mage::getModel('catalog/category')->load($categoryData[$i]['path'][$j+1]); 
                        if($category->getName() && !in_array($category->getEntityId(), $categoryThisLevel)){ 
                            $html .= '<li>'; 
                            $html .= '<a href="'.$category->getUrl().'">'.$category->getName().'</a><br/>'; 
                            //echo $layer.')<a href="'.Mage::getUrl('*/*/',array('id'=>$category->getEntityId())).'">'.$category->getName().'</a><br/>'; 
                            if($layer && $categoryData[$i]['path'][$j] != end($categoryData[$i]['path'])){ 
                                $html .= $this->getChild($category->getEntityId(), $layer - 1, $categoryData); 
                            } 
                            $html .= '</li>'; 
                            $categoryThisLevel[] = $category->getEntityId(); 
                            //echo $i.')level:  '.$parentId.' id:'.$j.' path:'.$categoryData[$i]['path'][$j].' name:'.$categoryM->getName().'<br/>'; 
                        } 
                    } 
                } 
            } 
        } 
        $html .= '</ul>'; 
        return $html; 
    }