To enable multisite support in wordpress do the following steps:

(1)Go to hsphere user's home directory and find the related folder for wordpress in which wp-config.php file exists.

(2)Edit wp-cofnig.php file and at end of file add below mentioned two lines:

/* Multisite */
define( 'WP_ALLOW_MULTISITE', true );

(3)Save wp-config.php file and open wordpress admin panel.

(4)You will find Network setup option under Tools in wordpress admin.You will have to disable all plugins before you activate network.Once the network is created, you may reactivate your plugins.