Here is one explanation that I got from this website:
http://www.snoopydude.com/wedding/filipinowedding.htm
These ceremonies are usually done in Catholic weddings.
Arrhae or Coin Ceremony: The Priest/Minister then drops 13 pieces of coins (silver or gold) called arras into the Groom's waiting hands, who
in turn drops it into the Bride's hands. The Bride then puts her hand above the Groom's then drops the arras into his hands again. The Groom allows the coins to then be dropped into a plate held by an acolyte.
The metal
tinkling of the coins being passed from one pair of hands to the other, is a distinctive reminder of the groom's promise to take care of his wife materially. The bride in return, by giving back the coins to his hands, convey that what
they both earn become part of each other's. The trickling sound also signifies abundance and success in the couple's joint efforts. The husband gives his material earnings to his wife who manages, saves and invests the money wisely,
as basic Filipino tradition dictates.
Veil Ceremony: In the Catholic ceremony, the Priest continues with the nuptial mass until the "Sanctus". When the bell for the Sanctus rings, it is also a signal for the
veil sponsors to come up to the altar. In Protestant ceremonies, the Minister explains the veil ceremony to the congregation and this constitutes as the cue for the veil sponsors.
Together, they pin a veil from the groom's
shoulders, extending it to cover the bride's head and shoulders. This is symbolic of the groom pledging his strength and protection to his bride - the wife who he promises to take care of, from this day forward.
Cord Ceremony: The Cord Ceremony follows immediately after. The Cord Sponsors come up to where the Bride and Groom are kneeling, and put a figure of eight cord over the veils that are on the heads and shoulders of the
Bride and Groom. This cord symbolizes unity and infinity - a love together, forever!