I need this on 3 pages, all 3 from different categories, and then to show several post excerpts from all 3 categories in sidebar of home page.
1 Answer
The Easiest way to do that would be to use List category posts plugin which allows you to list posts from a category into a post/page using the [catlist] shortcode.
you can also use this shortcode in a simple text widget and add just add :
add_filter('widget_text', 'do_shortcode');
to your theme's functions.php file, which will tell WordPress to render shortcodes in widgets.