MediaWiki:Common.css

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/* CSS placed here will be applied to all skins */
$wgHooks['SkinTemplateSetupPageCss'][] = 'wfHideVariousTabsFromAnonymous';

function wfHideVariousTabsFromAnonymous( &$hidetabcss ) {
	global $wgUser;

	if ( !$wgUser->isLoggedIn() ) {
		/* $hidetabcss .= 'li#ca-history, li#ca-viewsource, li#ca-edit, li#ca-talk, .vectorMenu { display: none; }'; */
                $hidetabcss .= 'li#ca-history, li#ca-viewsource, li#ca-talk, .vectorMenu { display: none; }'; 
	}

	return true;
}