Too bad about Tiger & Lily. I have a few suggestions that I hope will work!
First, definitely separate them again. Pretend you are introducing each to a brand new cat. I would leave Tiger in a bathroom during the day (letting Lily have free run of the house) and then swap them at night. This way they will each have quiet time to themselves, quiet time with you, and will smell the other cat without having to interact. I would do this for at least a week.
I would also get a Feliway diffuser (or two) to plug into the outlets in your house--ideally one in the bathroom and one elsewhere in the house. Feliway is a pheromone, or scent, produced by mother cats that is calming to other cats. It is good to use when bringing a new cat into the house or when there is a disruption in routine. It should help decrease the stress of both Tiger and Lily.
After a few days of separation, start feeding them on either side of the bathroom door. This way they can start to hear each other eating and sort of be near the other during a pleasurable time of their day.
I am separating them for a while. Once in a while my husband left the door open and once they saw each other.. Tiget will start growling and lily just charge..
If things are going well with the feeding part (ie. no one is hissing, they are both eating), then I would start leaving the bathroom door open a bit for a little while and let the one cat head out if he/she so desires. I would take a fabric softener sheet and wipe both cats down with it so they both smell the same before letting them together.
But don't force the togetherness. Just open the bathroom door and let whoever is in there come out on their own. I would allow exploration for maybe 15 min to start, increasing the time if all is going well.
Plus as soon as Tiger hear :i;y meow on other side.. he will start growling and hide under the bed. We also try brushing them with the same brush. Wipe them down with the wash cloth (same one) still does not work
If all of this doesn't seem to help, you may need to get a prescription of Prozac or a similar behavior modification drug from your vet to give both cats for a little while.
I will try the plug in the wall first
I think I would separate them for a longer period of time, swapping them every 12 hours or so (or whatever works for you). Definitely try the Feliway (don't get a generic). Keep feeding on either side of the closed door, even if Tiger is growling. It will take time, but hopefully they will learn to tolerate each other again.
They also refuse to eat if no one around.. They are very nervous eventhough we have separate room to feed drink or cat litter
Maybe try something liked canned food--it may be enough of a treat to get them to eat. And you could always be in one room while your husband is in the other, while they eat!