how can fix htaccess problem on NGINX ?

[Lock Down]

Hers is a Nginx Lighttpd Tutorial

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php [L]

The two RewriteCond statements check to make sure that there is no filename or directory that matches a user’s request. If not, then it rewrites to the index.php page. The [L] means to stop executing rewrites at that line.
Now for Nginx and it’s Rewrite module:
if (!-e $request_filename) {
rewrite ^(.*)$ index.php last;
}