您可以使用Conditional Tag in_category() 在循环内：

if( in_category( \'events\' ) ):
    // output stuff for events category post
else:
    // not in events category
endif;

function wpa8176_category_single_template( $template = \'\' ){
    $categories = get_the_category();
    foreach( $categories as $cat ):
        if( \'events\' == $cat->name ):
            $template = locate_template( array( "events-single.php", $template ), false );
        endif;
    endforeach;
    return $template;
}
add_filter( \'single_template\', \'wpa8176_category_single_template\' );