How do I post an html link on facebook via iphone?

Basically i need to post a link on facebook via iphone but the link is not directed i.e not in html just text and does not get linked if one tries to click on it.

Does anyone know how I can do that via iphone please?

example if i post [You must be registered and logged in to see this link.] it does not get linked.

What you are talking about is a hyperlink.

Unfortunately, the most you can do is just post the link. If someone needs to go to that link, they can simply copy and paste it into their browser.