Adding link to entry

Howdy, I have a "Diary" table in a MySql database. I have set up a basic form on my web page to insert the variables into the "Diary" table. All works well but I would like to try and implement a feature that I am not so sure how to do. Two form fields are "diaryContent" and "diaryLink". A typical entry would be a block of text for "diaryContent" and a URL address for "diaryLink". My goal is to somehow incorporate the $diaryLink variable into the $diaryContent block of text that is output onto the HTML page. For example, currently my variables display like this. A block of text with the link below. Block of text is the diaryContent information. This site is really cool so go visit it here. http://www.diaryLink.com... Am trying to get the "diaryLink" variable to display in the block of text. Block of text is the diaryContent information. This site is really cool so go <a href =$diaryLink>visit it here</a>. When I fill the form out to make a diary entry I wish to be able to choose which words are to be linked. Is this possible at all?? Regards Bruce