Mryntu

I'm tryng to display categories and subcategories on a cms page

<?php 
 $categories = Mage::getModel('catalog/category')
 ->getCollection()
 ->addAttributeToSelect('*')
 ->addIsActiveFilter();
 foreach ($_categories->getStoreCategories() as $_category) 
 $category = Mage::getModel('catalog/category'); 
 $category->load($_category->getId()); 
 $subcategories = explode(',', $category->getChildren()); 
?> 
 <dl> 
 <dt><?php echo $this->htmlEscape($_category->getName()); ?>
 </dt> 
 <dd> 
 <ol> 
 <?php 
 foreach ($subcategories as $subcategoryId) 
 $category->load($subcategoryId); 
 echo '<li><a href="' . $category->getURL() . '">' . $category->getName() . '</a></li>'; 
 
 ?> 
 </ol> 
 </dd> 
 </dl> 
 <?php
 
 ?>

But this is returning me a fatal error Fatal error: Call to a member function getStoreCategories() on null on line 5

You can try below code for display all store category and subcategories.

<?php
 $_helper = Mage::helper('catalog/category');
 $categories = $_helper->getStoreCategories();

 foreach ($categories as $_category) 
 $category = Mage::getModel('catalog/category')->load($_category->getId());
 $subcategories = $category->getChildrenCategories();
 ?>
 <dl>
 <dt><?php echo $this->htmlEscape($_category->getName()); ?></dt>
 <dd>
 <ol>
 <?php
 foreach ($subcategories as $_subcategory) 
 echo '<li><a href="' . $_subcategory->getURL() . '">' . $_subcategory->getName() . '</a></li>';
 
 ?>
 </ol>
 </dd>
 </dl>
 <?php

 
 ?>

Let me know if you have any query from above.

Please follow the below steps:

Step 1: Create new_list.phtml in frontend/your_theme/default/template/catalog/category and paste the below code :

 ================code starts here================

<div class="block block-list block-categories">
 <div id="block-categories" class="block-title active">
 <strong><span>Categories </span></strong>
 </div> 
 <div id="leftnav" class="block-content" style="display:block">
 <?php $helper = $this->helper('catalog/category') ?>
 <?php $categories = $this->getStoreCategories() ?>
 <?php if (count($categories) > 0): ?>
 <ul id="leftnav-tree" class="level0">
 <?php foreach($categories as $category): ?>
 <li class="level0<?php if ($this->isCategoryActive($category)): ?> active<?php endif; ?>">
 <a href="<?php echo $helper->getCategoryUrl($category) ?>"><span><?php echo $this->escapeHtml($category->getName()) ?></span></a>
 <?php //if ($this->isCategoryActive($category)): ?>
 <?php $subcategories = $category->getChildren() ?>
 <?php if (count($subcategories) > 0): ?>
 <ul id="leftnav-tree-<?php echo $category->getId() ?>" class="level1">
 <?php foreach($subcategories as $subcategory): ?>
 <li class="level1<?php if ($this->isCategoryActive($subcategory)): ?> active<?php endif; ?>">
 <a href="<?php echo $helper->getCategoryUrl($subcategory) ?>"><?php echo $this->escapeHtml(trim($subcategory->getName(), '- ')) ?></a>
 <?php $secondLevelSubcategories = $subcategory->getChildren() ?>
 <?php if (count($secondLevelSubcategories ) > 0): ?>
 <ul id="leftnav-tree-<?php echo $subcategory->getId() ?>" class="level2">
 <?php foreach($secondLevelSubcategories as $secondLevelSubcategory ): ?>
 <li class="level2<?php if ($this->isCategoryActive($secondLevelSubcategory )): ?> active<?php endif; ?>">
 <a href="<?php echo $helper->getCategoryUrl($secondLevelSubcategory ) ?>"><?php echo $this->escapeHtml(trim($secondLevelSubcategory ->getName(), '- ')) ?></a>
 </li>
 <?php endforeach; ?>
 </ul>
 <script type="text/javascript">decorateList('leftnav-tree-<?php echo $category->getId() ?>', 'recursive')</script>
 <?php endif; ?>
 <?php endforeach; ?>
 </ul>
 <script type="text/javascript">decorateList('leftnav-tree-<?php echo $category->getId() ?>', 'recursive')</script>
 <?php endif; ?>
 <?php //endif; ?>
 </li>
 <?php endforeach; ?>
 </ul>
 <script type="text/javascript">decorateList('leftnav-tree', 'recursive')</script>
 <?php endif; ?>
 </div>
</div>

 ===============code ends here===============

Step 2 : Call new_list.phtml in your CMS page or static block:

block type="catalog/navigation" name="catalog.category" template="catalog/category/new_list.phtml"

Hope, it will help.