Do you mean the lot is titled in the owners name now and you wish to have it transferred to your wife`s name once you receive a deed of sale?
..What does your tourist visa have to do with a land litle document?
Are you married to a Filipino and wish to have the house and lot in her name?
Foreigners cannot own land here unless by hereditary succession..(Im sure you knew that)

Look..Dont take too much advice from online forums etc.. Go and see a good lawyer for advice..
Try to find an attorney via friends/family recommendations.
Buying property here can be fraught with danger.