# Put * in Subdomains in cPanel to setup Wildcard
# Put this in .htaccess
 
Options +FollowSymLinks
 
RewriteEngine On
RewriteRule ^([aA-zZ])$  subslug.php?username=$1
 
RewriteCond %{HTTP_HOST} ^(^.*)\.yourdomain.com
RewriteRule (.*)  subslug.php?username=%1