Capitalize first letter in every words

ReReplace(str,"\b(\w)","\u\1","ALL")

This is a case sensitive replacement. To alter this simply use "ReReplaceNoCase" instead of ReReplace.

or else if you want to customize you can make it as function

<cffunction name="CapFirst" access="public" output="false" returntype="String">
<cfargument name="inputString" required="false" type="String" default="" />
<cfreturn rereplace(lcase(arguments.inputString), "(\b\w)", "\u\1", "all") />
</cffunction>

 Gud luck!