Make Category/Archive Use The Same Layout as Blog

Hello,

I am trying to make my single category archives display in the same look as my main blog. I tried using:

add_filter(‘avf_blog_style’,’avia_change_category_blog_layout’, 10, 2);
function avia_change_category_blog_layout($layout, $context){
if($context == ‘archive’) $layout = ‘single-big’;
return $layout;
}

But I am getting this error:
Warning: Use of undefined constant ‘avf_blog_style’ – assumed ‘‘avf_blog_style’’ (this will throw an Error in a future version of PHP) in functions.php on line 47

Warning: Use of undefined constant ’avia_change_category_blog_layout’ – assumed ‘’avia_change_category_blog_layout’’ (this will throw an Error in a future version of PHP) in functions.php on line 47

Thanks