This is the pupa of Malayan Eggfly shot by Ortega at CS.
http://forums.clubsnap.org/showthread.php?t=176026
I have one too but not as good, hence pointing you guys to see his first until I got a better shot then I post mine. When the cat is going to pupate, it will look for another plant other than it's host plant, I am thinking may be it is because of its host plant is too soft or dry out very fast or will be eaten very soon by its siblings. Hence, safer to pupate elsewhere.
Soon, I will be able to confirm the cat is belongs to Malayan Eggfly or Great Eggfly