Hey! This is my first tab and from just listening to the song. Les Choristes is a 
three-voices-choir but this song is sung only by two voices (soprano+alto). I will 
upload only the first voice's part (soprano's part). Enjoy!

"Vois sur ton chemin..."
E|-5--5--5--1--3---3--3--3--0--1--1--3--5--1-1-1---0-3-1-0--5-1-0---0----|
B|-----------------------------------------------3----------------3---2-3|
G|-----------------------------------------------------------------------|
D|-----------------------------------------------------------------------|
A|-----------------------------------------------------------------------|
E|-----------------------------------------------------------------------|


"Sens au coeur de la nuit..."
E|------3--1-0-1--3-1-0------3--1-0-5----0------|
B|-3--3-----------------3--3----------3----3-2-3|
G|----------------------------------------------|
D|----------------------------------------------|
A|----------------------------------------------|
E|----------------------------------------------| 

"?l?? il??..." (the 1st "?l?? il??")
E|-------------------5---------------3-3-3--3-3-3--1-0-
B|-3-3-3--4-4-4--4-4----2-1-2--2-2-2-------------------
G|-----------------------------------------------------
D|-----------------------------------------------------
A|-----------------------------------------------------
E|-----------------------------------------------------

"?l?? il??..." (the 2nd "?l?? il??")
E|-------------------5---------------3-3-3--3-3-3--1-0--|
B|-3-3-3--4-4-4--4-4----2-1-2--2-2-2-------------------3| 
G|------------------------------------------------------|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|------------------------------------------------------|

"Vois sur ton chemin..."
E|-5--5--5--1--3---3--3--3--0--1--1--3--5--1-1-1---0-3-1-0--5-1-0---0----|
B|-----------------------------------------------3----------------3---2-3|
G|-----------------------------------------------------------------------|
D|-----------------------------------------------------------------------|
A|-----------------------------------------------------------------------|
E|-----------------------------------------------------------------------|


"Sens au coeur de la nuit..."
E|------3--1-0-1--3-1-0------3--1-0-5----0-----|
B|-3--3-----------------3--3----------3----3-2-|
G|---------------------------------------------|
D|---------------------------------------------|
A|---------------------------------------------|
E|---------------------------------------------|

"Sens au coeur de la nuit..."
E|------3--1-0-1--3-1-0------3--1-0-5----0------|
B|-3--3-----------------3--3----------3----3-2-3|
G|----------------------------------------------|
D|----------------------------------------------|
A|----------------------------------------------|
E|----------------------------------------------| 




Here are the lyrics:

Vois sur ton chemin
Gamins oubli?s ?gar?s
Donne leur la main
Pour les mener
Vers d'autres lendemains

Sens au coeur de la nuit
L'onde d'espoir
Ardeur de la vie
Sentier de gloire

Bonheurs enfantins
Trop vite oubli?s effac?s
Une lumi?re dor?e brille sans fin
Tout au bout du chemin

Sens au coeur de la nuit
L'onde d'espoir
Ardeur de la vie
Sentier de gloire

?l?? il??
?l?i i?l?
?l?? il??
il?? i ?

?l?? il??
?l?i i?l?
?l?? il??
il?? i ? l?

(Repeat the first tablature)
Vois sur ton chemin
Gamins oubli?s, ?gar?s
Donne leur la main
Pour les mener
Vers d'autres lendemains

Sens au coeur de la nuit
L'onde d'espoir
Ardeur de la vie
Sentier de gloire. (Sens au)
Coeur de la nuit
L'onde d'espoir
Ardeur de la vie
Sentier de gloire.


I did my best. Hope this is the right tablature for this song. :)