How do I do this

I've got the following possible (example) strings: [hi] there, this is me [HI] there, this is me [ho] there, that is you [HO] there, that is you [hey] there, where are you [HEY] there, where are you and so on. I'm trying to come up with a regex that will find the capitalized text (only) between the square brackets, including the brackets (ie, the [HI], [HO], [HEY]) and basically put a <br> right before. So, after the regex/replace, it'll look like this: [hi] there, this is me <br>[HI] there, this is me [ho] there, that is you <br>[HO] there, that is you [hey] there, where are you <br>[HEY] there, where are you Now, the text between the brackets will be unknown, so I can't just do an instr() or strstr(). Any suggestions? Chris