Here, you can create one or more Websites, Stores or Store Views. You can have multiple websites, each with multiple stores which in turn may have multiple views. The latter are great for setting up stores with multiple languages.
Name (required)
Code (required)
Sort order
Default Store
Website (required)
Name(required)
Root Category (required)
Default Store View
Store (required)
Name (required)
Code (required)
Status (required)
Sort order
where is the guideline of implement own design????
catalog_category.tree ($parent_category_id, $store_view_code)
Returns an ordered array of categories.