Add categories template and ok to add one category in db, next modify and delete.

src/templates/categories.tpl

@@ -0,0 +1,35 @@
+{include file="admin/_head.tpl" title="%s"|args:$plugin.nom current="plugin_%s"|args:$plugin.id}
+
+{include file="%s_nav.tpl"|args:$plugin_tpl current="categories"}
+
+<form method="post" action="{$self_url}">
+  <fieldset>
+    <legend>Ajouter une catégorie</legend>
+    <dl>
+      {input type="text" name="name" label="Nom" required=true}
+    </dl>
+		<p class="submit">
+			{csrf_field key=$csrf_key}
+			{button type="submit" name="save" label="Ajouter" shape="right" class="main"}
+		</p>
+  </fieldset>
+</form>
+
+<table class="list">
+	<thead>
+		<th>Nom</th>
+		<td></td>
+	</thead>
+	<tbody>
+		{foreach from=$list item="cat"}
+			<tr>
+				<th>{$cat.name}</th>
+				<td class="actions">
+          {linkbutton shape="delete" label="Supprimer" href="supprimer_categorie.php?id=%d"|args:$cat.id}
+				</td>
+			</tr>
+		{/foreach}
+	</tbody>
+</table>
+
+{include file="admin/_foot.tpl"}