Current urls look like this:

siteDotcom/review/index2.php?item_id=13&

but I want them to look like

siteDotcom/review/index2/item_id/13/

I have this in HTaccess:

RewriteEngine On
RewriteRule ^index2/(.*).php /review/index2.php?item_id=$1

php_value error_reporting 2047
php_value display_errors 0

But that didnt change anything. What might I be doing wrong??

Do I need to change anything in the header of the pages in which I want to use modrewrite? I'm new to this...

if you dont mind me re-directing you,

you should check this tutorial out, is this what you are trying to achieve

http://www.phpfreaks.com/tutorials/23/0.php

mod_rewrite is an Apache module that handles rewriting on the Apache-level. If you make new rewrite rules, Apache will follow them, but it doesn't change the way that your HTML pages or PHP scripts actually output links. So there are really two steps: first is to create the correct htaccess code to handle rewritten URL's, then to edit your script/template to output URL's in the new format.

I think the htaccess you want is something like this:

RewriteEngine On
RewriteRule /index2/item_id/([0-9]+)/$ index2.php?item_id=$1

If your goal is search engine friendliness or usability, it may be preferable to route all 404's to a PHP handler script.

HTACCESS Code:

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule (.*) http://www.your-site.com/index.php

The PHP handler script would then look up the cached (preferable to database calls) content if it exists and serve the page - otherwise the request may be routed to your standard 404 page.