Getting Share Spell

[Drrakerr]

The game is mostly pathfinder, with 3.x materials being allowed on a case by case basis. Is there an item or feat that allow anyone to get share spell with an otherwise mundane mount?

[deuxhero]

Improved Share Spells feat doesn't require Share Spells, but does require an Animal Companion or Mount (the cavalier class feature, a handful of archetypes get it too)

[Psyren]

Animal Ally (http://www.d20pfsrd.com/feats/general-feats/animal-ally) will let you treat a horse as an animal companion, getting it Share Spells. You can then add in Boon Companion to boost its progression if you wish.