I would like to disable some widgets in case of browsing the site on a mobile device.
I have found this:
https://www.gavick.com/documentation/wo ... get-rules/
there I read: ""After switching widget rules on in the theme’s advanced settings, the following options should be displayed under each widget:"
but i can't find this option "widget rules" under the advanced settings. There are only things like cache or css-compression.
I am using Joomla 2.5.8 and the latest creative theme.
Please, could anyone help me out of this little problem

Thank's!
EDIT:
Found the problem - the posted documentation was for Wordpress based themes

But how can I specify similiar rules at Joomla? As simples as possible.