how to validate html for url link

[arobot]

I have a form that needs to be updated by multiple users. The information must be entered in the following format:



<a href="http://website.com">Write any title here</a> and then they can add a description

The users are not familiar with HTML and often submit it with incorrect syntax. I would like to prevent these errors prior to submission by writing some sort of validation. Is there a way to accomplish this? I imagine a macro is best for this situation. Multiple entries are often entered in a single cell (not sure if this would mess with the validation?)

Any ideas? Much appreciated!

[ItsMe]

It could be done with VBA. Why are you allowing the users to type anchor tags and href's? Why not just have them type the values that change and test what they input as part of a validation process?