trying to add mrna<->polypeptide links

templates/tripal_feature_base.tpl.php

+<?php
+$feature  = $variables['node']->feature;  ?>
+
+<div class="tripal_feature-data-block-desc tripal-data-block-desc"></div> <?php
+
+// the $headers array is an array of fields to use as the colum headers.
+// additional documentation can be found here
+// https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
+// This table for the analysis has a vertical header (down the first column)
+// so we do not provide headers here, but specify them in the $rows array below.
+$headers = array();
+
+// the $rows array contains an array of rows where each row is an array
+// of values for each column of the table in that row.  Additional documentation
+// can be found here:
+// https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
+$rows = array();
+
+// Name row
+$rows[] = array(
+  array(
+    'data' => 'Name',
+    'header' => TRUE,
+    'width' => '20%',
+  ),
+  $feature->name
+);
+// Unique Name row
+$rows[] = array(
+  array(
+    'data' => 'Unique Name',
+    'header' => TRUE
+  ),
+  $feature->uniquename
+);
+// Type row
+$rows[] = array(
+  array(
+    'data' => 'Type',
+    'header' => TRUE
+  ),
+  $feature->type_id->name
+);
+// Organism row
+$organism = $feature->organism_id->genus ." " . $feature->organism_id->species ." (" . $feature->organism_id->common_name .")";
+if (property_exists($feature->organism_id, 'nid')) {
+  $organism = l("<i>" . $feature->organism_id->genus . " " . $feature->organism_id->species . "</i> (" . $feature->organism_id->common_name .")", "node/".$feature->organism_id->nid, array('html' => TRUE));
+}
+$rows[] = array(
+  array(
+    'data' => 'Organism',
+    'header' => TRUE,
+  ),
+  $organism
+);
+// Seqlen row
+if($feature->seqlen > 0) {
+  $rows[] = array(
+    array(
+      'data' => 'Sequence length',
+      'header' => TRUE,
+    ),
+    $feature->seqlen
+  );
+}
+// allow site admins to see the feature ID
+if (user_access('view ids')) {
+  // Feature ID
+  $rows[] = array(
+    array(
+      'data' => 'Feature ID',
+      'header' => TRUE,
+      'class' => 'tripal-site-admin-only-table-row',
+    ),
+    array(
+      'data' => $feature->feature_id,
+      'class' => 'tripal-site-admin-only-table-row',
+    ),
+  );
+}
+// Is Obsolete Row
+if($feature->is_obsolete == TRUE){
+  $rows[] = array(
+    array(
+      'data' => '<div class="tripal_feature-obsolete">This feature is obsolete</div>',
+      'colspan' => 2
+    ),
+  );
+}
+
+// the $table array contains the headers and rows array as well as other
+// options for controlling the display of the table.  Additional
+// documentation can be found here:
+// https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
+$table = array(
+  'header' => $headers,
+  'rows' => $rows,
+  'attributes' => array(
+    'id' => 'tripal_feature-table-base',
+    'class' => 'tripal-data-table'
+  ),
+  'sticky' => FALSE,
+  'caption' => '',
+  'colgroups' => array(),
+  'empty' => '',
+);
+
+// once we have our table array structure defined, we call Drupal's theme_table()
+// function to generate the table.
+
+if ($feature->type_id->name == "mRNA") {
+    echo "<p><a href="">View corresponding polypeptide</a></p>";
+}
+else if ($feature->type_id->name == "polypeptide") {
+    echo "<p><a href="">View corresponding mRNA</a></p>";
+}
+
+print theme_table($table);