How to do a list with all categories and subcategories, from a given main-category

Question

I like to do a list with the name of all subcategories and sub subcategories from a giving main category.

I am really a bit new in Magento. But what I want to do, a list from all subcategories (name and url, as href) from the main category "Brands":

https://mag.outdoorequipped.com/

without the "All Brands" category but with those subcategories from "All Brands".

Any suggestions or link I can find some solution?

Answer 1

Try this.

Assume the ID of category "All Brands" is 3

    $parentCategoryId = 3;
    $childCategories = Mage::getModel('catalog/category')->getCategories($parentCategoryId);

  foreach ($childCategories as $child) {
        echo 'Name : ' . $child->getName() . '<br>'; // will print the sub category name
        echo 'Url : ' . $child->getRequestPath() . '<br><hr>'; // will print the URL
    }

NOTE: If you want to get more info about the sub category use below lines inside above foreach() loop.

$subCatData = $child->getData();

It will get an array of sub category data.

EDIT:

If you are in the category page you can get the current category ID by using below line of code. (instead of hard-coding the category ID use this way)

$ccurrentCategoryId = Mage::getSingleton('catalog/layer')->getCurrentCategory()->getId();

So now the code would be as follows in your scenario.

 $parentCategoryId = Mage::getSingleton('catalog/layer')->getCurrentCategory()->getId();
        $childCategories = Mage::getModel('catalog/category')->getCategories($parentCategoryId);

      foreach ($childCategories as $child) {
            echo 'Name : ' . $child->getName() . '<br>'; // will print the sub category name
            echo 'Url : ' . $child->getRequestPath() . '<br><hr>'; // will print the URL
        }

Answer 2

To get a collection of subcategories of a given category $parentCategory, use:

$subcategoryCollection = Mage::getModel('catalog/category')
    ->getCollection()
    ->addFieldToFilter('level', $parentCategory->getLevel() + 1) // remove this to go deeper
    ->addFieldToFilter('path', ['like' => $parentCategory->getData('path') . '%']);

(as described here: https://stackoverflow.com/q/5564647/664108)

As noted in the code comment above, you can use the level filter to specify how deep you want to recurse into subcategories. To get subcategories and sub-sub-categories but not sub-sub-subcategories, use this:

->addFieldToFilter('level', ['lte' => $parentCategory->getLevel() + 2])

(lte stands for less than or equal)

If you want to show the categories sorted by parent like this

1
1.1
1.1.1
1.1.2
1.2 2
2.1

add this line:

$subcategoryCollection->setOrder('path', Varien_Data_Collection_Db::SORT_ORDER_ASC);

Depending on what data you need to display, select the attributes to select:

$subcategoryCollection->addAttributeToSelect(['name', 'description', 'image']);

You can always select all attributes with addAttributeToSelect('*') instead, but I don't recommend it because it results in unneccessary queries to the EAV tables.

Then you can foreach over $subcategoryCollection and display the subcategories however you wish.

Example template:

<?php foreach ($subcategoryCollection as $category): ?>
    <a href="<?php echo $category->getUrl() ?>">
        <?php echo $this->htmlEscape($category->getName()) ?>
    </a>
<?php endforeach; ?>