magento增加左侧导航栏

1、打开 app\design\frontend\default\modern\layout\catalog.xml，在适当位置加入以下代码：

<reference name=”left”>

 <block type=”catalog/navigation” name=”cms_catalog” 
template=”catalog/catalog.phtml”/>

 </reference> 

2、在 app\design\frontend\default\modern\template\catalog 下新建 catalog.phtml 文件，其内容为以下代码：

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<?php $current_cat = $this->getCurrentCategory();?>    <?php $current_cat = (is_object($current_cat) ? $current_cat->getName() : ”);?><div>    <?php $collection = $this->getStoreCategories();?>    <?php foreach ($collection as $_category):?>    <?php if ($_category->getName() == $current_cat) {?> <a  href=”<?php echo $this->getCategoryUrl($_category)?>”><?php echo $_category->getName()?><br/>    <?php }else{ ?>    <h2><a href=”<?php echo $this->getCategoryUrl($_category)?>”> <?php echo $_category->getName()?></a></h2>    <?php }?>    <?php foreach($_category->getChildren() as $_childCategory):?>    <?php if ($_childCategory->getName() == $current_cat) {?>    <a href=”<?php echo $this->getCategoryUrl($_childCategory)?>”><?php echo $_childCategory->getName()?></a><br/>    <?php }else{ ?>    <h6><a href=”<?php echo $this->getCategoryUrl($_childCategory)?>”><?php echo $_childCategory->getName()?></a></h6>    <?php }?>    <?php foreach($_childCategory->getChildren() as $_cchildCategory):?>    <?php if ($_cchildCategory->getName() == $current_cat) {?>    <a href=”<?php echo $this->getCategoryUrl($_cchildCategory)?>”><?php echo $_cchildCategory->getName()?></a><br/>    <?php }else{ ?>    <h6 style=”margin-left:10px;”><a href=”<?php echo $this->getCategoryUrl($_cchildCategory)?>”><?php echo $_cchildCategory->getName()?></a></h6>    <?php }?>    <?php endforeach?>    <?php endforeach?>    <?php endforeach?>    </div>

进入前台，发现效果已经显现。