Question Detail

Step:-1 Open the folder “application/config” and open the file “config.php“. find and replace the below code in config.php file.

//find the below code   
$config['index_page'] = "index.php" 
//replace with the below code
$config['index_page'] = ""

Step:-2 Go to your CodeIgniter folder and create .htaccess

Path:
Your_website_folder/
application/
assets/
system/
.htaccess <——— this file
index.php

Step:-3 Write below code in .htaccess file

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L] 
</IfModule>

Step:-4 In some case the default setting for uri_protocol does not work properly. To solve this problem just open the file “application/config/config.php“, then find and replace the below code

//find the below code
$config['uri_protocol'] = "AUTO"
//replace with the below code
$config['uri_protocol'] = "REQUEST_URI" 

That's all but in wamp server, it does not work because rewrite_module by default disabled so we have need to enable it. for this do the following

1) Left click WAMP icon
2) Apache
3) Apache Modules
4) Left click rewrite_module

Add this code to your .htaccss file.
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /testproject/
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>