Form Validation

I am making a website for friends, and i need to find, or make a script that creates a really simple table where the admin user will see a backend showing last name's and another data column....there will be about 20 rows. I want the admin user to be able to enter data in some sort of form, but have that form output HTML showing a table of User ID's (instead of last names, for anonymity)....So to sum it all up I need to make some sort of form that will validate into a HTML of about 20 rows and 2 colums

Sounds like you want a database table with 2 columns in it.
You could create a MYSQL table and give the admin user the permissions to edit the table contents (via some user friendly app such as phpMyAdmin)
You then just need to write a php page to query the database and display the contents however you like.
This assumes that
(a) you have MYSQL and php support on your hosted site
and
(b) "sort of form that will validate into a HTML" means display as HTML, which perhaps it doesn't (?)