Assuming your husband is British, he needs to apply for his CNI at his local Registrars.
If you are marrying in July, wait a while until you apply, as it is only valid for 3 months.

I would tell him to apply for it, around the middle of may.
It cost me £30.00 last year.
Once he has applied, it takes 3 weeks until he receives it.
When he comes to the Philippines to marry you, he will need to change his British CNI, to the Philippine version, at the British Embassy in Manila.

Then you can apply for your license.

Don't forget, you will need to get a CENOMAR (Certificate of no marriage) to prove you are free to marry him.

Just use the search facility on the forum & look up CNI & CENOMAR. Should give you some more answers.