Even easier is to put the following, assuming your data is in column A:
In column B: ="*"&A1&"*"
Fill down to the bottom. Now you have two choices:
1) Hide column A
2) Copy column B and Paste Special -> Values into a new column. Delete both column A and B and insert a new column with the values you copied from column B. (it will require an new cut and paste)
**Edit, I was assuming your data was in columns, which may not be your case.