Thanks for trying to help, I really appreciate it. I've done as you said, perhaps I have done it incorrectly. I have a simple select field. I'm not sure what you mean "inbetween the select fields". I've put the values you stated, but now the select box cannot be clicked on. It appears and the values seem correct, but you can't click on them at all.
I have now tried to do this again, I was able to get the option box working again by putting quotes around optgroup. That has not solved my problem, all of the articles still appear together. They are all in the same category (the name of the menu), I need them to be subcategorised by starter, mains, desserts. What is the best way to acheive this?
I have managed to group my items by using a simple select, and by using list search ordering. What I now would like to do is to put each different option on a new row. Is that possible? Is there a way to say only include items from this option?