added getter method to retrieve markup

SubstitutionTemplate.class.php

@@ -37,6 +37,17 @@ public function set_tpl($tpl){
 		return $this;
 	}
 
+	/**
+	 * Retrieves the markup for the given key
+	 * It returns false if the key isn't defined
+	 * @param string $key key to be searched
+	 */
+	public function get_markup($key){
+		if(isset($this->static_markup[$key]))
+			return $this->static_markup[$key];
+		return false;
+	}
+
 	/**
 	 * Set the static markup; ie: prev\next\loading divs
 	 * @param string|array $key the searches to be substituted
@@ -88,4 +99,4 @@ public function replace_markup(){
 			$this->tpl
 		);
 	}
-}
+}