Well I found the feat Lighten Weapon, but apperently its not good enough, since he wants it at 1st level
Lighten Weapon (Combat)
You can balance heavy weapons, making them easier to wield.
Prerequisite: Str 13, BAB +3.
Benefit: Choose one type of weapon. When using a weapon of that type you may reduce the effort required to wield it by one step but suffer a −2 penalty to hit with that weapon. This allows you to wield a weapon 1 size category larger as if it were your own size, use a two-handed weapon in one hand, or a one-handed as a light weapon.
Normal: Weapons 1 size category larger increase the effort required to wield them by one step: light becoming one-handed, one-handed becoming two-handed, and twohanded becoming un-wieldable. Two-handed weapons may not be used one-handed. Using a one-handed weapon in your off hand results in a −2 penalty to all of your attacks (in addition to other off-hand penalties that may apply).
Special: The effect of this feat does not stack with other feats that alter wielding effort or weapon size. You maytake this feat multiple times, each time choosing a different type of weapon.
Example: Rogar the human fighter takes Lighten Weapon and chooses greatsword. He can now use a Medium greatsword in one hand with a −2 penalty to hit, gaining 1 x Strength bonus to damage. He can also wield a Large greatsword in two hands with a −2 penalty to hit (In addition to normal penalties for wielding wrong sized weapon) and adding 1.5 x Strength bonus to damage.