Replay Philips Livingcolors remote signal
The Living Colors series has two versions (AFAIK). Generation 1, which the remotes used a MSP430 microcontroller connected to a CC2500 RF Transceiver which pairs with another CC2500 in the lamp itself. Because there is an open bus between the two, someone (Sprite_TM a very awesome hacker) reverse engineered the protocol between the CC2500 and the MSP430 (PDF).

All you need is a CC2500 module and the right code to make your own. http://www.knutsel.org/ has a ton of info on it, including an arduino shield.

The Generation 2 aka Smartlink, did away with the CC2500 and MSP430, and went with a single chip CC2530 System on Chip Zigbee IC. So there is no way to sniff the protocol between the chip. And the wireless protocol is encrypted, so even with a Zigbee sniffer, you cannot know what commands to use. The one you link to is a Generation 2 Livingcolors.

But tada, Phillips has released more Zigbee based products, including the Hue Bridge, essentially a HTTP based Ethernet-to-Zigbee bridge which can be paired with the Gen 2 Livingcolors lamps. And throw in an open API, as well as a ethernet or wifi shield, you get arduino control. (Video)