This is custom posttype url and custom posttype single pgae

Current url : http://example.com/customposttype-title-slug/?parent=parentvalue

I Need url : http://example.com/customposttype-title-slug/parentvalue/

Following is example of what we are looking for. We're trying this in wordpress and we require all parameters as a variable

Example 1 : http://example.com/tno/?parent=abc

Need this : http://example.com/tno/abc

Example 2 : http://example.com/tno/?parent=abc&sub1=abc&sub2=abc

Need this : http://example.com/tno/abc/abc/abc

funtion.php code OR .htaccess rule any suggestion.

Thanks in advance