codecrafter current (31) and date picker script

[eluser]fourcs[/eluser]
The datepicker of jquery or mootools require some flagging attribute in the input field tag.
e.g.
jquery: <input name = 'date1', class = 'date-pick'>
mootools: <input name = 'date1', id = 'date1'> and date1 is identified in page header

Problem is to get CI's form_input function to place these attributes in the generated html.
Thanks