override portfolio nav - toranj wp

functions.php

/**
 * ----------------------------------------------------------------------------------------
 * Override portfolio nav 
  * ----------------------------------------------------------------------------------------
 */
function owlab_portfolio_single_nav() { 
	
	$next = get_next_post();
	$prev = get_previous_post();
	
	$prev_class = "fa-angle-left";
	$next_class = "fa-angle-right";
	if ( is_rtl() ){
		$next_class = "fa-angle-left";
		$prev_class = "fa-angle-right";
	}

	if ($next OR $prev){
	?>
		<ul class="portfolio-nav">
			
			<?php if ( $prev ) : ?>
			<li>
				<a class="portfolio-prev" href="<?php echo get_permalink( $prev->ID ); ?>">
					<i class="fa <?php echo $prev_class; ?>"></i>
					<span><?php _e('Prev','toranj') ?></span>
				</a>
			</li>
			<?php endif; ?>

			<li class="portfolio-back-li">
				<a class="portfolio-back" href="<?php echo get_post_type_archive_link('owlabpfl');?>">
					<i class="fa fa-bars"></i>
					<span><?php _e('All','toranj') ?></span>
				</a>
			</li>

			<?php if ( $next ) : ?>
			<li>
				<a class="portfolio-next" href="<?php echo get_permalink( $next->ID ); ?>">
					<i class="fa <?php echo $next_class; ?>"></i>
					<span><?php _e('Next','toranj') ?></span>
				</a>
			</li>
			<?php endif; ?>

		</ul><?php
	}
}