Mounted Ranger Style (3.5e Alternate Class Feature)
From D&D Wiki
 Mounted Ranger Style
Instead of Archery, or Two Weapon Fighting, some Rangers specialise in Mounted Combat.
Level: 1st, 6th, 11th
Replaces: Combat Style, Improved Combat Style, Combat Style Mastery.
Benefit: At 2nd level you gain Mounted Combat as a Bonus Feat, at 6th, Ride-By attack, and at 11th, Spirited Charge, reguardless of wether or not you acually meet the pre-requisits for these feats.