.htaccess

RewriteEngine on
RewriteRule ^project/([0-9]+)/$ http://www.niceview.be/index.php?p=project&id=$1 [L]
RewriteRule ^(.*)/$ http://www.niceview.be/index.php?p=$1 [L]

RewriteEngine on
RewriteRule ^project/([0-9]+)/$ http://www.niceview.be/index.php?p=project&id=$1 [L]
RewriteRule ^(.*)/$ http://www.niceview.be/index.php?p=$1 [L]

RewriteEngine on
RewriteRule ^project/([0-9]+)/?$ index.php?p=project&id=$1 [NC,L]
RewriteRule ^([a-z]+)/([0-9]+)/?$ index.php?p=$1&id=$2 [NC,L]]

RewriteEngine on
RewriteRule ^project/([0-9]+)/?$ index.php?p=project&id=$1 [NC,L]
RewriteRule ^([a-z]+)/([0-9]+)/?$ index.php?p=$1&id=$2 [NC,L]]