AD Nidalee might seem a bit weird at first, but is actually a great build, most of the time will be spent in cat form once you get it, but even then dont be afraid to leave it to toss spears around or heal :)

The runes and masteries are put are basic guidelines and do not need to be strictly adhered to, to succeed at AD Nidalee. However I find the AP/lvl glyphs quite nice in late game to help even out my dmg and support ability. But again feel free to play around with the runes until you find what feels right :)

The masteries are fairly obvious, but some changes you may wish to make, FEEL FREE!

For items I open with a Doran's Blade 90% of the time, I will occasionally opt for either boots and pots or Cloth armor and pots if I know I will need it. From there my build is fairly simple. I rush a Wriggle's Lantern for the sustain in lane and the free ward and then I get an Atmogs (Warmog's / Atma's for those who don't know) those combination of items will give you high survibility and also good damage output. For boots it usually depends on what I'm playing against, however I usually opt for Merc treads.

1) Don't forget that you run way faster when going through bushes so use this to your advantage when chasing or fleeing enemies.
2) You can jump over smaller walls with Pounce make sure to do this to give you higher mobility and a great way to juke.
3) Javelin Toss is a great harass tool, since you have it early try to harass with it at max range.
4) Even though you will have low AP, your heal is still useful for the AS buff, toss it onto a carry or yourself for extra damage output.