Can I cut the brown off the end of the leaves and will it grow back?
You can cut the brown off, but it will only continue down the leaf killing the whole leaf. These will not grow back. They will, however, grow more from the top of the plant. It would be best to find out the cause of the problem. If this is in container, then it would likely be due to over- feeding, over-watering, or compacted soil.
This collection of articles will give you information on the care of these plants: https://www.gardeningknowhow.com/edible/fruits/pineapples/