Can you help a regex beginner out.

I need to set up a redirect to add an ?Itemid=550 to these urls. I believe I should be able to do this with one statement.

Current URLs
/component/cobalt/category-items/1-directory/9-marine-science
/component/cobalt/item/9-marine-science/73-black-bryan-a?Itemid=289

End result I would like them to be
/component/cobalt/category-items/1-directory/9-marine-science?Itemid=550
/component/cobalt/item/9-marine-science/73-black-bryan-a?Itemid=550


First I need to check if they start with /component/cobalt/. ^(/component/cobalt/)
I don't know how to handle the end part. Some of the urls have an Itemid already and some do not.

I think that my 'To URL' field would be {pathfrombase}?Itemid=550 but I am not sure.

Please advise. Thanks.

Thanks, however there is one piece of this puzzle I have accidentally left out.

I have many urls like below that need to be left alone.
Is it possible to modify the previous code you provided to ignore when the {query} = '?option=com_cobalt'

Thank you so much for you help. It is greatly appreciated.

Hi Luigi,

I am going back to your original advise, however when I use the code below I get an error that the redirect is directing in a way which will never succeed. I believe that this is because the 'To URL' is getting caught again in the 'From URL' as it still matches. Any ideas on how to make this work?

admin wrote:

Try this:

From URL: ^/component/cobalt/
To URL: {scheme}://{siteurl}{path}?Itemid=550&{query}

Thanks very much for your help.