update .htaccess

<IfModule mod_rewrite.c>
  Options +FollowSymlinks
# Options +SymLinksIfOwnerMatch
  RewriteEngine On
  RewriteBase /
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule ^(.*)$ index.php?/$1 [L] // >> modify with name of your folder, if your folder name is ci-bonfire => RewriteRule ^(.*)$ ci-bonfire/index.php?/$1 [L]
</IfModule>