Setting up anchored layered navigation is a two-step process. First, you need to set up the filterable attributes. Then, make the category an anchor. http://go.magento.com/support/kb/entry/name/anchor-categories/
Step 1: Set the Attribute Properties
- From the Admin menu, select Catalog > Attributes > Manage Attributes.
- Click to open the attribute in Edit mode, and do the following:
- Scroll down to the Frontend Properties section, and set Use In Layered Navigation to one of the following:
- Filterable (with results)
- Filterable (no results)
- Set Use In Search Results Layered Navigation to “Yes.”
- Scroll down to the Frontend Properties section, and set Use In Layered Navigation to one of the following:
Step 2: Make the Category an Anchor
- From the Admin panel, select Catalog > Manage Categories.
- In the Categories panel on the left, click to open the category. Then, do the following:
- On the Display Settings tab, set Is Anchor to “Yes.”
- Click the Save Category button.
- To test the setting, go to your store and select the category from the top navigation. The layered navigation with filters will appear in the left sidebar of the page.
