Replace with wildcard, in SQL

Question

I know MS T-SQL does not support regular expression, but I need similar functionality. Here\'s what I\'m trying to do:

I have a varchar table field which stores a b

Answer 1

declare @test1 nvarchar(max)
set @test1='/ID1:Category1/ID2:Category2/ID3:Category3/'
while(CHARINDEX('ID',@test1)<>0)
Begin
select @test1=REPLACE(@test1,SUBSTRING(@test1,CHARINDEX('ID',@test1),CHARINDEX(':',@test1)-
CHARINDEX('ID',@test1)+1),'') 
End
select @test1