Here’s a way to do it without formulas or macros:
- Save your CSV as Excel
- Select any cells that might have commas
- Open to the Format menu and click on Cells
- Pick the Custom format
- Enter this => \”@\”
- Click OK
- Save the file as CSV
(from http://www.lenashore.com/2012/04/how-to-add-quotes-to-your-cells-in-excel-automatically/)