Giac,
I do not want to disappoint you but ...
it wasn't the quotes that stopped your blue clicky thingy from working.
In your first attempt you wrote <a href:"http://www…
with other words you replaced the correct equal sign = with an incorrect colon.
When you removed the quotes, you also corrected the = which made it work, not the removing of the quotes!
HTH,
MudGuard