Allow to avoid escaping in Solr query

lib/BookSearch.php

@@ -29,9 +29,11 @@ class BookSearch
         $this->query->addParam('q.op', 'AND');
     }
 
-    public function addQuery($queryText, $queryField = null)
+    public function addQuery($queryText, $queryField = null, $escape = true)
     {
+        if($escape) {
             $queryText = SolrUtils::escapeQueryChars($queryText);
+        }
 
         if (strlen($queryField) > 0) {
             $queryText = "$queryField:\"$queryText\"";

mobile.netbiblio.php

@@ -342,9 +342,9 @@ class NetBiblio extends WebService
             });
             if (count($selectedCategories) > 0) {
                 $selectedCategories = array_map(function ($c) {
-                    return "categoryCode: $c";
+                    return 'categoryCode:'.SolrUtils::escapeQueryChars($c);
                 }, $selectedCategories);
-                $bs->addQuery('(' . implode(' OR ', $selectedCategories) . ')');
+                $bs->addQuery('('.implode(' OR ', $selectedCategories).')', null, false);
             }
         }