Shortcode that accepts a category field which is usually displayed as bullet points and turns into a comma separated values string

gv_listify.php

<?php
//usage [gv_listify field="{Field Merge Tag}"]
add_shortcode( 'gv_listify', 'gv_listify_shortcode' );
function gv_listify_shortcode( $atts ) {
	extract( shortcode_atts(
		array(
			'field' => '',
		), $atts )
	);

	$content = str_replace(',','</li><li>',$field);
	$content = '<ul><li>'.$content.'</li></ul>'; 
	return $content;
}