How to remove application folder name in code igniter - .htaccess

Question

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
#Removes access to the system folder by users.
#Additionally this will allow you to create a System.php controller,
#previously this would not have been possible.
#'system' can be replaced if you have renamed your system folder.
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
#When your application folder isn't in the system folder
#This snippet prevents user access to the application folder
#Submitted by: Fabdrol
#Rename 'application' to your applications folder name.
RewriteCond %{REQUEST_URI} ^main.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
#Checks to see if the user is attempting to access a valid file,
#such as an image or css document, if this isn't true it sends the
#request to index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
RewriteCond %{HTTP_HOST} .
RewriteCond %{HTTP_HOST} !^www.domain.com [NC]
RewriteRule (.*) http://www.domain.com/$1 [R=301,L]
</IfModule>
<IfModule !mod_rewrite.c>
# If we don't have mod_rewrite installed, all 404's
# can be sent to index.php, and everything works as normal.
# Submitted by: ElliotHaughin
ErrorDocument 404 /index.php
</IfModule>
Currently the URLs are showing up as http://www.domain.com/main/home but I would rather have it appear as http://www.domain.com/home. How can I change that?

Answer 1

Should just be these lines (not positive about the first, the second for sure though):
RewriteRule (.*) http://www.domain.com/main/$1 [R=301,L]
RewriteRule ^(.*)$ /main/index.php?/$1 [L]

Answer 2

Try adding this near the top of your rules:
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^/?main/(.*)$ /$1 [L,R]

Answer 3

Codeigniter has built in routes which is helpful in your situtation. In routes.php :
$route['home'] = 'main/home';