RewriteCond  %{REQUEST_FILENAME}  !-F
RewriteCond  %{REQUEST_FILENAME}  !-D
RewriteRule  ^(.*)/(.*).html$                    index.php?req=cat&id=$1&offs=$2 [L]

RewriteCond  %{REQUEST_FILENAME}  !-F
RewriteCond  %{REQUEST_FILENAME}  !-D
RewriteRule  ^(.*)/index\.html$                  index.php?req=cat&id=$1 [L]

RewriteCond  %{REQUEST_FILENAME}  !-F
RewriteCond  %{REQUEST_FILENAME}  !-D
RewriteRule  ^(.*)/$                             index.php?req=cat&id=$1 [L]

RewriteCond  %{REQUEST_FILENAME}  !-F
RewriteCond  %{REQUEST_FILENAME}  !-D
RewriteRule  ^(.*)\.html$                        index.php?req=detailed&id=$1 [L]

RewriteCond  %{REQUEST_FILENAME}  !-F
RewriteCond  %{REQUEST_FILENAME}  !-D
RewriteRule  ^(.*)$                              index.php?req=cat&id=$1 [L]