Hiding Categories

  1. Go to your store's admin area.
  2. Click Inventory > Gear Icon > Manage Categories, in the dashboard navigation.
  3. Find the Category you'd like to hide and click the "Edit" link on the right hand side.
  4. Uncheck "Allow theme to display link?".
  5. Click save.

This Category will still be accessible directly by it's URL, but won't be visible in your Storefront.