PayPal is good for loading the Smart Money card & also for loading Smart prepaid reloads.
You can use it through pldtonline. You'll need to register and the first transactions are about 48 hours while they verify. Thereafter only a couple of hours during the working day in The Phils. You can buy lots of items on the pldt website including Jollibee gift certificates!!!
Limit is US$200 per month initially but it is a lot cheaper than WU (incidentally sending the same amount from WU in Hong Kong is only £2.50 compared to £16 in the UK!!!!)
Using paypal for ebay Philippines transactions is not easy - very few local sellers accept. If you put pressure on the bigger regular "ebay shops" they will accept for a premium. But if the item you are buying is below the customs limit then for many items the Philippines price on ebay (e.g. computer peripherals) is so high that it is much cheaper to buy in the UK & airmail! As an example a webcam that is on ebay Philippines today in large quantities at £28 delivered can be bought in The UK from Scan for £12.