RewriteEngine on

RewriteRule ^(users|categories|login)$ $1.php [NC,L]
RewriteRule ^(content|users|settings|pages)/([-\w]+)$ $1.php?section=$2 [NC,L]
RewriteRule ^(content|settings)/([-\w]+)/([-\w]+)$ $1.php?section=$2&subsection=$3 [NC,L]
RewriteRule ^(post|discussion|user|confirm)/([\d]+)$ $1.php?id=$2 [NC,L]
RewriteRule ^(post|user|edit)/([\d]+)/([-\w]+)$ $1.php?id=$2&section=$3 [NC,L]
RewriteRule ^(user)/([\d]+)/([-\w]+)/([-\w]+)$ $1.php?id=$2&section=$3&subsection=$4 [NC,L]
RewriteRule ^(edit|delete)/([-\w]+)/([\d]+)$ $1.php?section=$2&id=$3 [NC,L]
RewriteRule ^(users)/search/([-\w]+)$ $1.php?keyword=$2 [NC,L]
RewriteRule ^(content)/([-\w]+)/search/([-\w]+)$ $1.php?section=$2&keyword=$3 [NC,L]