HTML vs Code Forms

[eluser]CI_Newb[/eluser]
Just a question regarding best practice or thoughts on this.

So you have a large form, do you

a) code the form in standard html, php stuff like that or
b) code the entire form in php using echo's and the sorts.

I just redid 1 of mine and the all code looks much cleaner but just wondering what the pro's do.