If you're in the US try Greenies pill pockets for cats. They're highly flavored little dough things, not super expensive. My cats love them and now they're a very special treat (for when a very special treat is needed the most).

Pro tip, though: don't try to put the capsule in the pill pocket like in the picture. It's a fool's game. They say you can but it's a waste of time, even when it's not cracked or banged up, which is rare.

Your best bet is to ignore the "pocket" altogether and flatten the whole thing into a thin, even, round pancake (maybe 1" to 1.25") with your thumb into the palm of one hand, dump the contents of the capsule in the middle, and then carefully bring up the sides like you're making dim sum. Pinch the top around the med to close completely and then roll it gently around in your palm.

This method also lets you use all the broken ones in the bottom; just squish as many as you need all together. If they're a little dry add a tiny bit of water and they'll mash together as if new.

If there's too much med and you can't close it, use two, or however many. I had one pill from a vet that was far too big to just shove down his throat to start with, and I had to quarter it into four to use the pill pockets, but they worked.

They can be a pain in the ass, but as long as no material escapes from the pill cover I make with them I've never had a cat refuse one. I have, however, had every cat I ever owned tell me to fuck ALL the way off with anything sprinkled on their food. It's worth a try if you already have the meds.