Made a copy of form_helper.php

Copied form_helper.php from /system/helpers/ and put it in
/application/helpers/.  Now my copy will take precedence so I can make
changes here without affecting the core form_helper.php
Making form_helper.php more convenient

The following will now automatically add a matching ID based on the name
attribute:

form_input
form_password
form_textarea
form_dropdown
form_checkbox (form_radio will also be affected, as it uses
form_checkbox)

The following previously accepted an array for the attributes.  I
personally prefer to type them in as text, so I changed the attributes
parameter to accept a string (you can still use the array version also
if you are so inclined):

form_label
Created a form_helper sample page

Note:

I removed the sample/ folder in controllers, and created just a
sample.php controller.  Everything will now route through sample.php.

Created my form_helper view to demonstrate the changes that were made in
helpers/form_helper.php.  Each item that was changed will have a small
preview of the changes that were made.