HI Its really annoying when WordPress sometimes adds tags in multiline text inputs when you really dont need them. So to get rid of those tags you can use the following php function,
Here the string part refers to the string that your getting through WordPress or maybe as a Magic fields input field. and you can use the allow part to allow any tags that you might actually want to leave in the out put.
This will actually strip all HTML tags leaving anchor tags and UL tags in the output. Pretty useful hack. 🙂