formatting form input/sql insert

I'm collecting data with from textarea inputs. The user may enter a linebreak with the return key, or a tab, etc. I then write this data to a mySQL table, formatting the data with addslashes(). I then output the data to a text file using a "select into file" statement. When I import the file into excel, or view it with an editor, the user entered tabs & linebreaks are being interpreted as field separators and record separators. How do I format the input to solve this problem? Thanks! -Bob