How can I increase the max_input_vars value from A Small Orange Shared Hosting
You can try increase the default value of max_input_vars via htaccess for your A Small Orange shared hosting.
php_value max_input_vars 2000
if you got 500 error, you should use following
<IfModule mod_php5.c> php_value max_input_vars 2000 </IfModule>
More methods can be checked by following link
How to Increase max_input_vars
Note: for Shared Hosting of A Small Orange, will requires a full copy of the server’s main php.ini for settings to be overridden. Please contact support of A Small Orange to get full copy of the server’s main php.ini