Finally fixed my problem. I would like to share my answer to all of you.
I am currently using a mac, my rename my .htaccess file into htaccess.txt
And had the following code inside htaccess:
RewriteEngine On
#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?/$1 [L]
#When your application folder isn't in the system folder
#This snippet prevents user access to the application folder
#Submitted by: Fabdrol
#Rename 'application' to your applications folder name.
RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ index.php?/$1 [L]
#Checks to see if the user is attempting to access a valid file,
#such as an image or css document, if this isn't true it sends the
#request to index.php
#RewriteCond %{ENV:REDIRECT_STATUS} ^$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [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
Then make sure Apache is reading the htaccess.txt file by doing this:
Uncomment the following line on your httpd.conf
Go inside to the extra/httpd-default.conf file and change this line of code: AccessFileName .htaccess
to AccessFileName htaccess.txt
Restart Apache server
Inside your config, make sure to leave 'base_url' empty (index page can still be there, doesn't matter). And $config['uri_protocol'] = 'REQUEST_URI';
Hope this can help others out there!