This article was written for Magento 1.x and is kept for reference. Running Magento 1 in 2026 is a security risk — ask me about migrating to Magento 2 / Adobe Commerce.
Build a nested category navigation with the catalog/category helper and getChildrenCategories().
The full article is being restored as part of the site rebuild. Need this fix right now? Contact me and I'll send you the complete steps — or solve it on your store directly.