Save values from foreach loop in wp_editor

wp_editor function accepts (array) $settings param and that one can contain textarea_name as a key. If it’s not being specified, it’s set by default as $editor_id. See: https://github.com/WordPress/WordPress/blob/c392ff6f90d550bad876d8a984ad6b3b8a49cd96/wp-includes/class-wp-editor.php#L44

So you might want to do something like this:

foreach ($get_url as $list) {
    ...
    $settings = array( 'textarea_name' => 'uploaded_csv[]' );
    ...
    wp_editor( $link, $editor_id, $settings );
    ...
}

And in your saving function, you simply loop over the $_POST['uploaded_csv'] array

function save_wp_editor_fields(){
    global $post;
    foreach ( $_POST['uplaoded_csv'] as $key => $uploaded_csv ) {
        update_post_meta($post->ID, 'my_uploaded_csv_'.$key, $uploaded_csv);
    }
}

Of course you should figure out the uniqueness of the created meta (eg. giving it a number or handle more meta keys per post with non unique name. See http://codex.wordpress.org/Function_Reference/add_post_meta).

Hope this helps a bit!