JIN:Rの投稿ページに「前の記事へ」「次の記事へ」を追加し、管理者のみに表示する

<?php if (jinr__comment_remove()) : ?>
	<?php comments_template(); ?>
<?php endif; ?>

//ここにいれます

<?php if (jinr__profile_display_postbottom() == true) : ?>
	<?php if (!get_post_meta($post->ID, '_jinr_profile_display', true) == "1") : ?>
		<div class="jinr-profile-label ef"><span><?php echo jinr__profile_label_text(); ?></span></div>
		<?php echo do_shortcode('[jinr_profile design="d--profile-author"]'); ?>
	<?php endif; ?>
<?php endif; ?>

<?php if (jinr__comment_remove()) : ?>
	<?php comments_template(); ?>
<?php endif; ?>

<?php if ( current_user_can( 'manage_options' ) ) { //　管理者の場合 ?>
	<?php 
	$prev_post = get_previous_post(); 
	$next_post = get_next_post(); 
	if( $prev_post || $next_post ): 
	?>
		<nav class="page-nav">
		<?php if( $prev_post ): ?>
			<a href="<?php echo get_permalink( $prev_post->ID ); ?>" class="prev-link">
				<span>< 前の記事へ</span><br /><?php echo get_the_title( $prev_post->ID ); ?>
  		</a><br />
  	<?php endif; ?>
  	<?php if( $next_post ): ?>
  		<a href="<?php echo get_permalink( $next_post->ID ); ?>" class="next-link">
  			<span>次の記事へ ></span><br /><?php echo get_the_title( $next_post->ID ); ?>
  		</a>
  	<?php endif; ?>
		</nav>
	<?php endif; ?>
<?php } ?>

<?php if (jinr__profile_display_postbottom() == true) : ?>
	<?php if (!get_post_meta($post->ID, '_jinr_profile_display', true) == "1") : ?>
		<div class="jinr-profile-label ef"><span><?php echo jinr__profile_label_text(); ?></span></div>
		<?php echo do_shortcode('[jinr_profile design="d--profile-author"]'); ?>
	<?php endif; ?>
<?php endif; ?>

.page-nav {
	padding-top: 3.3rem;
	display: flex;
	justify-content: space-between;
	font-size: 80%;
	gap:2em;
	border-top: 1px solid #4466ce;
}
.page-nav a {
	display: block;
	font-weight: bold;
	width: 48%;
	color: #4466ce;
}
.page-nav a:hover {
	opacity: 0.7;
}
.page-nav a:last-child {
	display: block;
	text-align: right;
}
@media (min-width: 552px) {
	.page-nav {
		padding-top: 6rem;
	}
}