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کافی است ماجول زیر را بنویسید
Sub ReverseText()
'Updateby20131128
Dim Rng As Range
Dim WorkRng As Range
On Error Resume Next
xTitleId = "KutoolsforExcel"
Set WorkRng = Application.Selection
Set WorkRng = Application.InputBox("Range", xTitleId, WorkRng.Address, Type:=8)
For Each Rng In WorkRng
xValue = Rng.Value
xLen = VBA.Len(xValue)
xOut = ""
For i = 1 To xLen
getChar = VBA.Right(xValue, 1)
xValue = VBA.Left(xValue, xLen - i)
xOut = xOut & getChar
Next
Rng.Value = xOut
Next
End Sub