Reorder Post Column

add_filter('manage_posts_columns', 'reorder_admin_columns');

function reorder_admin_columns($columns) {

    $n_columns = array();

    $move = 'author'; // Column to move

    $before = 'title'; // Move before this column

    foreach($columns as $key => $value) {

        if ($key == $before) {

            $n_columns[$move] = $move;

        }

        $n_columns[$key] = $value;

    }

    return $n_columns;

}