Add 2 fields to the categories

roxer82, it’s not clear what you want to do.

Add two new categories
or
Add two fields to the categories table

Thanks for your answer MichaelH but how can I add the new two fields to the admin?

What two fields do you want to add?

One called “Marca” and other one called “Modelo”

Instead of changing wp_categories table, which would be hard to do, consider using Custom Fields.

I just did it and edited the categories.php file
but where should I edite the “update”? because when I edite some category adding this info it doesn’t save the info

You’d need to add fields with phpMyAdmin to the wp_categories table and change wp-admin/admin-db.php.

Not too sure what else you’d have to change.

Thanks!!! it’s working now ??
One more question, do you know how to show them at the theme?

Take a look at Function_Reference/wpdb_Class for various possible ways to get data (via row or variable}.

The Select a Variable has an example for getting data from the Category table.

Thank you so much MichaelH!
One more thing, do you know what php file should I edit to do the same at the “Posts”?

Your theme’s index.php file assuming you are talking about displaying that data for each post.

Extra resources:

The Loop
Template Hierarchy