Set parameters on $_GET to display different metadata on an Omeka's items/show template.

custom-item-show.php

<?php head(array('title' => item('Dublin Core', 'Title'), 'bodyid'=>'items','bodyclass' => 'show')); ?>

<div id="primary">

    <!-- Our item view navigation. Sets a parameter on $_GET, so we can change what gets displayed accordingly. -->
    <a href="<?php echo abs_item_uri(); ?>?view=transcript">View Transcript</a> | <a href="<?php echo abs_item_uri(); ?>">View Metadata</a>

    <h1><?php echo item('Dublin Core', 'Title'); ?></h1>
    
    <?php if (@$_GET['view'] == 'transcript'): ?>

        <h2>Transcript</h2>
        <?php echo item('Item Type Metadata', 'Text'); ?>

    <?php else : ?>

        <p>Other metadata fields</p>

        <!-- The following returns all of the files associated with an item. -->
        <div id="itemfiles" class="element">
            <h3><?php echo __('Files'); ?></h3>
            <div class="element-text"><?php echo display_files_for_item(); ?></div>
        </div>

        <!-- If the item belongs to a collection, the following creates a link to that collection. -->
        <?php if (item_belongs_to_collection()): ?>
        <div id="collection" class="element">
            <h3><?php echo __('Collection'); ?></h3>
            <div class="element-text"><p><?php echo link_to_collection_for_item(); ?></p></div>
        </div>
        <?php endif; ?>

        <!-- The following prints a list of all tags associated with the item -->
        <?php if (item_has_tags()): ?>
        <div id="item-tags" class="element">
            <h3><?php echo __('Tags'); ?></h3>
            <div class="element-text"><?php echo item_tags_as_string(); ?></div>
        </div>
        <?php endif;?>

        <!-- The following prints a citation for this item. -->
        <div id="item-citation" class="element">
            <h3><?php echo __('Citation'); ?></h3>
            <div class="element-text"><?php echo item_citation(); ?></div>
        </div>
    
    <?php endif; ?>

    <?php echo plugin_append_to_items_show(); ?>

    <ul class="item-pagination navigation">
        <li id="previous-item" class="previous"><?php echo link_to_previous_item(); ?></li>
        <li id="next-item" class="next"><?php echo link_to_next_item(); ?></li>
    </ul>

</div><!-- end primary -->

<?php foot(); ?>