CUNY Academic Commons

<?php

$from = [ 20613, 22677 ];

$to = 25691;

$links = [];

foreach ( $from as $from_id ) {

	switch_to_blog( $from_id );

	$from_links = get_bookmarks();

	foreach ( $from_links as $from_link ) {

		$bookmark = get_bookmark( $from_link->link_id, ARRAY_A );

		$cat_names = array_map(

			function( $cat_id ) {

				$cat = get_term( $cat_id, 'link_category' );

				return $cat->name;

			},

			$bookmark['link_category']

		);

		$bookmark['cat_names'] = $cat_names;

		unset( $bookmark['link_id'] );

		$links[] = $bookmark;

	}

	restore_current_blog();

}

switch_to_blog( $to );

foreach ( $links as $link ) {

	$link_id = wp_insert_link( $link );

	if ( ! $link_id ) {

		print_r( $link );

		die;

	}

	wp_set_object_terms( $link_id, $link['cat_names'], 'link_category' );

}

restore_current_blog();