Can you elaborate a bit?
The categories automatically show up once you create and configure.
You can read more about it here.
- Login to Admin
- Catalog -> Manage Categories -> Click on the default category to the left -> Click on “Add Subcategory”
- Fill in the details -> Make sure you set active to “yes”
- Finally “Save”
Create the products (Make sure to set them to enabled and set the inventory count and “in stock” to yes if you’re tracking inventory), then assign the category for that item.
If this isn’t what you were asking for, please let me know.
P.S. You can find most general questions by searching this forum or in Google.