bp_groups_filter_kses( string $content = '' )

function bp_groups_filter_kses( $content = '' ) {

	/**
	 * Note that we don't immediately bail if $content is empty. This is because
	 * WordPress's KSES API calls several other filters that might be relevant
	 * to someone's workflow (like `pre_kses`)
	 */

	// Get allowed tags using core WordPress API allowing third party plugins
	// to target the specific `buddypress-groups` context.
	$allowed_tags = wp_kses_allowed_html( 'buddypress-groups' );

	// Add our own tags allowed in group descriptions.
	$allowed_tags['a']['class']    = array();
	$allowed_tags['img']           = array();
	$allowed_tags['img']['src']    = array();
	$allowed_tags['img']['alt']    = array();
	$allowed_tags['img']['width']  = array();
	$allowed_tags['img']['height'] = array();
	$allowed_tags['img']['class']  = array();
	$allowed_tags['img']['id']     = array();
	$allowed_tags['code']          = array();

	/**
	 * Filters the HTML elements allowed for a given context.
	 *
	 * @since BuddyPress 1.2.0
	 *
	 * @param string $allowed_tags Allowed tags, attributes, and/or entities.
	 */
	$tags = apply_filters( 'bp_groups_filter_kses', $allowed_tags );

	// Return KSES'ed content, allowing the above tags.
	return wp_kses( $content, $tags );
}