Depending on wwhether you have used [ ] elsewhere in the document the following macro should work
Code:
Sub Macro1()
Dim oRng As Range
Dim oColl As Collection
Dim i As Integer
Set oColl = New Collection
Set oRng = ActiveDocument.Range
With oRng.Find
Do While .Execute(findText:="\[*,*\]", MatchWildcards:=True)
oColl.Add oRng.Text
Loop
End With
For i = 1 To oColl.Count
ActiveDocument.Range.InsertAfter vbCr & oColl(i)
DoEvents
Next i
lbl_Exit:
Set oRng = Nothing
Set oColl = Nothing
Exit Sub
End Sub