I struggled with this for many years and prayed about it a lot. In the end I found that the only way I could deal with it was to cut out of my life, all the things that might lead me to it. I stopped watching t.v, I stopped going into places that sold magazines of any kind and I went offline. I discovered that none of these things were essential in my life and I didn't miss them at all. The lust that I seemed to be incapable of stopping, just faded away without any source to feed from. Now I can look at t.v, use the internet etc, without feeling the need to seek out inappropriate images. Perhaps removing the source of this temptation from your life, will help you as it did me. God will help you to do it if you surrender it all to Him. 

Hi, I really feel for you, I had a husband who also had to have the porn. It is very hard on every one, but with a willing heart and Gods help, you can overcome this addiction.[1 corinthians 10:13] No Temptation Has Seized You Except What Is Common To Man. And God Is Faithful; He Will Not Let You Be Tempted Beyond What You Can Bear. But When You Are Tempted, He Will Also Provide A Way Out So That You Can Stand Up Under It. Also in
[1 Corinthians 7:5] (1 corinthians is the book of love) Do not deprive each other except by mutual concent and for a time, so that you may devote yourselves to prayer. Thenn come together again so that Satan will not tempt you because of your lack of self control. and then again in [Matthew 26:41] it says, Watch and pray so that you will not fall into temptation, the spirit is willing, but the body is weak.
I know this is hard, but when the temptation hits you, the best thing you can do is get to your knees and pray until the temptation has gone. After a time, you will suddenly realize that this is almost gone then one day it won't even be there any more. It is a process and will probably take a while so don't give up. Think about how much you love your wife, it could help a lot.
Father, I lift up this dear one to your loving care, and mercy, and ask that you would comfort him as he faces this problem. Comfort him and give him the strength and courage to follow through and to come out victorious. Lord, only in you can we find the strength, courage and will to overcome trials that invade our lives. Father, I ask that you would grant his family the patience and love to help see him through this hard time, and draw them ever closer together as this battle is won little by little. Comfort them and let your grace cover them always, and bless this family, father, as they draw closer to you in this process. Lord, I ask that you would give him the will to come to you every time the temptation comes and that you will cover him with your peace each time he comes to you. Lord, I pray that you would bring about a restoration in this family and that through these trials, they will be drawn closer to you. Thank yu Father, for the answer to this and all the prayers going out for this family. Father, Bless them and keep them in your loving care, and comfort. Thank you Father, In the blessed and precious name of Jesus Amen
God bless