The attribute lists in the layered navigation on a category page can easily be reordered to appear in any order you want.
- Go to Catalog > Attributes > Manage Attributes.
- Click on an attribute you want to move.
- In Frontend Properties, change the number in the Position higher or lower, depending on the order you want the layered navigation to appear in.
- Click Save Attribute.
- Do this for each attribute that needs moving up or down in your list.