WP All Import WooCommerce Trick: Add Path to Multiple Images Per Product

Rather than use a FOREACH loop, you would need to use a custom PHP function on this data. Here’s the function that I’ve inserted into the Function Editor on your site (All Import -> Settings):

function my_image_func( $url, $id, $images ) {
	$fixed_list = str_replace(", ", ",", $images);
	$images = explode( ",", $fixed_list );
	$return = array();
	foreach( $images as $image ) {
		$return[] = $url . "/" . $id . "/" . $image;
	}
	return implode( ",", $return );
}

The function itself would be used like this on your data:

[my_image_func("http://siresource.com/wp-content/uploads/bull_images",{id[1]},{picture[1]})]

This function replaces spaces with dashes, removes parenthesis, and lower cases the letters. This is good if the images were uploaded to WordPress in the admin area.

function my_image_func($images ) {
	$fixed_list = str_replace(", ", ",", $images);
	$images = explode( ",", $fixed_list );
	$return = array();
	foreach( $images as $image ) {
		$wp_image = str_replace(" ", "-", $image);
		$wp_image = str_replace("(", "", $wp_image);
		$wp_image = str_replace(")", "", $wp_image);
		$wp_image = strtolower($wp_image);
		$return[] = $wp_image;
	}
	return implode( ",", $return );
}

The function can be used like this: [my_image_func({picture[1]})]

It’s still a better idea to rename the images.