Is there one last filter that is ran over the widgets before they are sent out to the browser? I would like to add a filter that adds rel="nofollow" to all links in all widgets.
For instance, I can add a filter to the text widget:
add_filter('widget_text', 'xrvel_nfp_modify_nofollow');
But I don't want to hunt down every single hook for every widget. (Also, the RSS widget doesn't even HAVE a filter. Trac ticket submitted)
There is another thread on here that discusses a workaround.
Well... the familiar php workaround when a function does not provide a "get to variable" output actually... use ob_start: http://php.net/manual/en/function.ob-start.php to just capture the output and manipulate it before sending it on its way.
Leads on stackoverflow: https://stackoverflow.com/search?q=%2Bwordpress+sidebar+%2Bob-start+
The output is completely up to each individual widget. It is echoed directly by the widget's widget() method, so there's no general filters that apply to all of them.
