Enanbles drag and drop on taxonomy lists for a custom order
Upload Custom Taxonomy Order to your WordPress blog and activate it.
Click on Settings (or go to Tools -> Taxonomy Order) and enable taxonomies.
Go to each taxonomy and drag and drop them for a desired order.
Note: When using a custom WP_Query, add 'meta_key' => 'position', 'orderby' => 'position' to display the terms in the set order.