Is there anything like 3.5's Aptitude weapon property in Pathfinder?

Question

A wielder who has feats that affect the use of a particular type of weapon, such as Weapon Focus, Greater Weapon Focus, Weapon Specialization, or the like, can apply the benefits of those feats to any weapon that has the aptitude quality. In addition, if any of the wielder's weapons use feats are specifically keyed to the aptitude weapon's type he gains a +1 bonus on attack and damage rolls. --Tome of Battle

Is there anything in pathfinder that has a similar effect to the 3.5 Aptitude weapon property in that you're able to apply weapon specific feats to other weapons?

Answer 1

Yes

The Martial Mastery feat allows you to apply weapon-specific feats to entire groups of similar weapons.

Prerequisites: Martial Versatility, fighter level 16th, human.

Benefit: Each combat feat you have that applies to a specific weapon (e.g., Weapon Focus) can be used with all weapons in the same weapon group.

A non-exhaustive list of weapon groups can be found under the Fighter's Weapon Training ability and is reproduced below. Note that some weapons appear in multiple groups and that "GMs may add other weapons to these groups, or add entirely new groups."

• Axes
• Blades, Heavy
• Blades, Light
• Bows
• Close
• Crossbows
• Double
• Firearms
• Flails
• Hammers
• Monk
• Natural
• Polearms
• Siege engines
• Spears
• Thrown

Answer 2

There are some feats related to fighter weapon groups, which is similar to what you are looking for. Some require fighter levels but not all. Here are two I found that don't require fighter levels:

Martial Focus (Combat)

Choose one fighter weapon group. While wielding a weapon from this group with which you are proficient, you gain a +1 bonus on damage rolls.

Weapon Master’s Handbook

and...

Defensive Weapon Training (Combat)

Choose a weapon group from the fighter's weapon training class ability list (except natural weapons). You gain a +2 dodge bonus on AC when an opponent attacks you using a weapon from that group. If you also have the weapon training class feature in the selected group, your dodge bonus from this feat increases to +3.

Ultimate Combat

For reference, fighter weapon groups are groups of thematically related weapons (axes, flails, thrown, etc.), defined in the Weapon Training ability of the Fighter class.