Here is the solution
1) Open ".htaccess" file. (you can find this file on root directory of the site.)
2) add following line at the end of file
AddHandler application/x-httpd-php52 .php .php5 .php4 .php3
Actually above line changes PHP version of your site.
I change my site PHP version into 5.2 and oscsid from web site all urls will automatically disappear.
If PHP5.2 version is not working for your site.
you can also switch into other PHP versions for using these lines one by one
To switch to PHP 4.0:
AddHandler application/x-httpd-php4 .php .php4 .php3
To switch to PHP 5.0:
AddHandler application/x-httpd-php5 .php .php5 .php4 .php3
To switch to PHP 5.1:
AddHandler application/x-httpd-php51 .php .php5 .php4 .php3
To switch to PHP 5.2:
AddHandler application/x-httpd-php52 .php .php5 .php4 .php3
To switch to PHP 5.3:
AddHandler application/x-httpd-php53 .php .php5 .php4 .php3
To switch to PHP 5.4:
AddHandler application/x-httpd-php54 .php .php5 .php4 .php3
To switch to PHP 5.5:
AddHandler application/x-httpd-php55 .php .php5 .php4 .php3
To switch to the secure PHP 5.2 with Suhosin patch:
AddHandler application/x-httpd-php52s .php .php5 .php4 .php3
To switch to PHP 5.6:
AddHandler application/x-httpd-php56 .php
To switch to PHP 7:
AddHandler application/x-httpd-php7 .php
To switch to PHP 7.1:
AddHandler application/x-httpd-php71 .php
Try your luck and check which version is suitable for you.