Disables lightbox functionality for a specific gallery ID.

gistfile1.php

<?php
add_filter( 'envira_gallery_pre_data', 'tgm_envira_disable_lightbox', 10, 2 );
function tgm_envira_disable_lightbox( $data, $gallery_id ) {
    
    // You can target this by specific ID if you want. If you want this for all galleries, just remove this line. Change 324 to your gallery ID.
    if ( 324 !== $gallery_id ) {
        return $data;
    }
    
    // Empty the link field for each image.
    foreach ( (array) $data['gallery'] as $id => $item ) {
        if ( ! empty( $data['gallery'][$id]['link'] ) ) {
            unset( $data['gallery'][$id]['link'] );
        }
    }
    
    // Return the modified data.
    return $data;
    
}