your trying to make a list i take it, and currently using a textarea where you want each newline to be a new list item.
Many options… but… depends on your skill levels…
1. The way i would do it - use Pixel and Tonics Matrix field
2. Use a WYSIWYG editor and make the list in HTML as you enter it
3. Create a plugin to take your data from your field and convert it to a list. This will save you doing the same thing in each template, over and over enabling php. For your use, quite a simple way, and probably youir best option if you already have a lot of data in the db.