bp_document_forums_embed_attachments( $content,  $id )

function bp_document_forums_embed_attachments( $content, $id ) {

	// Do not embed attachment in wp-admin area.
	if ( is_admin() ) {
		return $content;
	}

	$document_ids = get_post_meta( $id, 'bp_document_ids', true );

	if ( ! empty( $document_ids ) && bp_has_document(
		array(
			'include'  => $document_ids,
			'order_by' => 'menu_order',
			'sort'     => 'ASC',
			'privacy'  => array( 'forums' ),
		)
	) ) {
		ob_start();
		?>
		<div class="bb-activity-media-wrap forums-media-wrap">
			<?php
			while ( bp_document() ) {
				bp_the_document();
				bp_get_template_part( 'document/activity-entry' );
			}
			?>
		</div>
		<?php
		$content .= ob_get_clean();
	}

	return $content;
}