diff --git a/system/helpers/inflector_helper.php b/system/helpers/inflector_helper.php
index b1864cb..bf70a67 100644
--- a/system/helpers/inflector_helper.php
+++ b/system/helpers/inflector_helper.php
@@ -36,34 +36,36 @@
  * @access	public
  * @param	string
  * @return	str
- */		
-function singular($str)
-{
-    $str = strtolower(trim($str));
-    $end = substr($str, -3);
+ */	
+if (! function_exists('singular'))
+{	
+	function singular($str)
+	{
+	    $str = strtolower(trim($str));
+	    $end = substr($str, -3);
     
-    if ($end == 'ies')
-    {
-        $str = substr($str, 0, strlen($str)-3).'y';
-    }
-    elseif ($end == 'ses')
-    {
-        $str = substr($str, 0, strlen($str)-2);
-    }
-    else
-    {
-        $end = substr($str, -1);
+	    if ($end == 'ies')
+	    {
+	        $str = substr($str, 0, strlen($str)-3).'y';
+	    }
+	    elseif ($end == 'ses')
+	    {
+	        $str = substr($str, 0, strlen($str)-2);
+	    }
+	    else
+	    {
+	        $end = substr($str, -1);
         
-        if ($end == 's')
-        {
-            $str = substr($str, 0, strlen($str)-1);
-        }
-    }
+	        if ($end == 's')
+	        {
+	            $str = substr($str, 0, strlen($str)-1);
+	        }
+	    }
     
-    return $str;
+	    return $str;
+	}
 }
 
-
 // --------------------------------------------------------------------
 
 /**
@@ -75,32 +77,34 @@
  * @param	string
  * @param	bool
  * @return	str
- */		
-function plural($str, $force = FALSE)
-{
-    $str = strtolower(trim($str));
-    $end = substr($str, -1);
+ */	
+if (! function_exists('plural'))
+{	
+	function plural($str, $force = FALSE)
+	{
+	    $str = strtolower(trim($str));
+	    $end = substr($str, -1);
 
-    if ($end == 'y')
-    {
-        $str = substr($str, 0, strlen($str)-1).'ies';
-    }
-    elseif ($end == 's')
-    {
-        if ($force == TRUE)
-        {
-            $str .= 'es';
-        }
-    }
-    else
-    {
-        $str .= 's';
-    }
+	    if ($end == 'y')
+	    {
+	        $str = substr($str, 0, strlen($str)-1).'ies';
+	    }
+	    elseif ($end == 's')
+	    {
+	        if ($force == TRUE)
+	        {
+	            $str .= 'es';
+	        }
+	    }
+	    else
+	    {
+	        $str .= 's';
+	    }
 
-    return $str;
+	    return $str;
+	}
 }
 
-
 // --------------------------------------------------------------------
 
 /**
@@ -111,12 +115,15 @@
  * @access	public
  * @param	string
  * @return	str
- */		
-function camelize($str)
-{		
-	$str = 'x'.strtolower(trim($str));
-	$str = ucwords(preg_replace('/[\s_]+/', ' ', $str));
-	return substr(str_replace(' ', '', $str), 1);
+ */	
+if (! function_exists('camelize'))
+{	
+	function camelize($str)
+	{		
+		$str = 'x'.strtolower(trim($str));
+		$str = ucwords(preg_replace('/[\s_]+/', ' ', $str));
+		return substr(str_replace(' ', '', $str), 1);
+	}
 }
 
 // --------------------------------------------------------------------
@@ -129,10 +136,13 @@
  * @access	public
  * @param	string
  * @return	str
- */		
-function underscore($str)
+ */	
+if (! function_exists('underscore'))
 {
-	return preg_replace('/[\s]+/', '_', strtolower(trim($str)));
+	function underscore($str)
+	{
+		return preg_replace('/[\s]+/', '_', strtolower(trim($str)));
+	}
 }
 
 // --------------------------------------------------------------------
@@ -145,10 +155,13 @@
  * @access	public
  * @param	string
  * @return	str
- */		
-function humanize($str)
-{
-	return ucwords(preg_replace('/[_]+/', ' ', strtolower(trim($str))));
+ */	
+if (! function_exists('humanize'))
+{	
+	function humanize($str)
+	{
+		return ucwords(preg_replace('/[_]+/', ' ', strtolower(trim($str))));
+	}
 }
 	
 ?>
\ No newline at end of file