The PRO version of DB Replacer also supports the use of Regular Expressions to search and replace.

This gives you great power to search for dynamic values and use (parts of) the searched text in the replacement.

For example, if you want to make all prices with syntax $123.00 bold, you can search for:

(\$[0-9]+\.[0-9][0-9])

And replace with:

<strong>\1</strong>

This will make $1.00 and $999.00 bold, but ignore $1 and $999.

When the Regular Expressions option is checked, you will also be able to search in UTF-8 mode. This can help you when using special characters or certain character sets.

More on Regular Expressions

For help and documentation on regular expressions, ReReplacer comes with a Regular Expressions Cheat Sheet.

For more info on Regular Expressions: http://www.regular-expressions.info/reference.html
For testing them: http://gskinner.com/RegExr, http://regexpal.com, http://www.phpliveregex.com