Short Haft( Player's Handbook II, p. 82)
[Fighter Bonus Feat, General]
You have trained in polearm fighting alongside your comrades in arms, sometimes reaching past them while they shield you, and sometimes shielding them while they attack from behind you.
base attack bonus +3, Proficiency with a reach weapon, Weapon Focus with a reach weapon,
As a swift action, you can choose to lose the benefit of wielding any reach weapon other than a spiked chain or a whip. In return, you can use that weapon to threaten and attack spaces adjacent to you. With another swift action, you can give up this feat's benefit in order to regain the use of your weapon's superior reach.
A fighter can select Short Haft as one of his fighter bonus feats.