RewriteEngine On
RewriteRule ^([a-z]+)_([0-9]+)$ index.php?mod=$1&fid=$2 [L,QSA]
RewriteRule ^([a-z]+)_([0-9]+)_([a-z0-9]+)$ index.php?mod=$1&fid=$2&page=$3 [L,QSA]
RewriteRule ^([a-z]+)_([0-9]+)_([0-9]+)_([a-z0-9]+)$ index.php?mod=$1&fid=$2&nk=$3&page=$4 [L,QSA]
RewriteRule ^who_([a-z]+)$ who.php?mod=$1 [L,QSA]
RewriteRule ^who_([a-z]+)_([0-9]+)$ who.php?mod=$1&fid=$2 [L,QSA]
## Админка
##Попадаем в форум/раздел/тему
RewriteRule ^admin_([a-z0-9]+)$ admin.php?mod=$1 [L,QSA]
RewriteRule ^admin_([a-z0-9]+)_([0-9]+)$ admin.php?mod=$1&fid=$2 [L,QSA]
##Попадаем в форум/раздел/тему
RewriteRule ^admin_([a-z0-9]+)_([0-9]+)_([a-z0-9]+)$ admin.php?mod=$1&fid=$2&page=$3 [L,QSA]
RewriteRule ^([a-z0-9]+)$ $1.php [L,QSA]
RewriteRule ^([a-z0-9]+)_([a-z0-9]+)$ $1_$2.php [L,QSA]
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)$ $1/$2.php [L,QSA]
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)_([a-z0-9]+)$ $1/$2_$3.php [L,QSA]
########################Ссылки##########################################################
RewriteRule ^([a-z0-9]+).php10$ $1.php [L,QSA] #
RewriteRule ^([a-z0-9]+).wml$ $1.php [L,QSA] #
RewriteRule ^([a-z0-9]+).html$ $1.php [L,QSA] #
RewriteRule ^([a-z0-9]+).cgi$ $1.php [L,QSA] #
RewriteRule ^([a-z0-9]+).perl$ $1.php [L,QSA] #
RewriteRule ^([a-z0-9]+).shaxter$ $1.php [L,QSA] #
RewriteRule ^([a-z0-9]+).shaxty$ $1.php [L,QSA] #
#
RewriteRule ^([a-z0-9]+)_([a-z0-9]+).php10$ $1_$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)_([a-z0-9]+).wml$ $1_$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)_([a-z0-9]+).html$ $1_$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)_([a-z0-9]+).cgi$ $1_$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)_([a-z0-9]+).perl$ $1_$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)_([a-z0-9]+).shaxter$ $1_$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)_([a-z0-9]+).shaxty$ $1_$2.php [L,QSA] #
#
RewriteRule ^([a-z0-9]+)/([a-z0-9]+).php10$ $1/$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+).wml$ $1/$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+).html$ $1/$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+).cgi$ $1/$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+).perl$ $1/$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+).shaxter$ $1/$2.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+).shaxty$ $1/$2.php [L,QSA] #
#
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)_([a-z0-9]+).php10$ $1/$2_$3.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)_([a-z0-9]+).wml$ $1/$2_$3.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)_([a-z0-9]+).html$ $1/$2_$3.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)_([a-z0-9]+).cgi$ $1/$2_$3.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)_([a-z0-9]+).perl$ $1/$2_$3.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)_([a-z0-9]+).shaxter$ $1/$2_$3.php [L,QSA] #
RewriteRule ^([a-z0-9]+)/([a-z0-9]+)_([a-z0-9]+).shaxty$ $1/$2_$3.php [L,QSA] #
########################################################################################