Warning: in_array() expects parameter 2 to be array

hi

I was adding posts to my site mandeelectrical.co.uk, it then logged me off and now all i get is this error message. i have no idea how to fix this as i cant log in.

This is the error message
Warning: in_array() expects parameter 2 to be array, string given in /home/mandeelectrical/public_html/wp-content/themes/catch-evolution/functions.php on line 164

Warning: Cannot modify header information – headers already sent by (output started at /home/mandeelectrical/public_html/wp-content/themes/catch-evolution/functions.php:164) in /home/mandeelectrical/public_html/wp-includes/pluggable.php on line 1207