1st Ark. Cavalry (Col. James C. Monroe)
8th Ark. Cav. aka 2nd Ark. Cav. (Col. Thomas J. Morgan)
4th Ark. Cav. (Colonel Anderson Gordon)
7th Ark. Cav. (Col. John F. Hill)
Gunter's Arkansas Cavalry Battalion
17th Ark. Cav. Battalion (Lieutenant Colonel John M. Harrell)
8th Ark. Field Battery (Captain William M. Hughey)
Here is a link that will clarify which regiments received which numbers.
http://en.wikipedia.org/wiki/List_of_Arkansas_Civil_War_Confederate_units
Bryce