How to use htaccess to change site.com/directory/ to site.com/ ?

If you only want http://kingphp.com/money directory become http://kingphp.com, use:RewriteRule ^catalog/$ / [L]

If you want all directories become http://kingphp.com, use:
RewriteEngine On RewriteBase /

RewriteRule ^([^/]+)$ /catalog/$1 [L] RewriteRule ^$ /catalog/ [L]

Note:If you have other subfolders in there (in that catalog dir, you’ll need some additional rule for that also. This will rewrite your files from catalog/ subfolder to your main url.