Please help....Concerning Close Combatant ability of Fighter Archetype (Brawler)

[Mhordekai]

Close Combatant (Ex)

At 3rd level, a brawler gains a +1 bonus on attack rolls and a +3 bonus on damage rolls with weapons in the close weapon group. Both of these bonuses increase by +1 for every four levels beyond 3rd (to a maximum of +5 on attack rolls and +7 on damage rolls at 19th level).

This ability replaces weapon training 1 and 2.

Question - Does the bonus increase only apply to fighter(brawler) class levels or does it apply to character levels? (eg: multiclass character)

[mplindustries]

Every class ability that mentions levels refers to levels in that class unless specifically called out otherwise (for example, an Oracle's curse).

[LoneKnave]

Fighter. You could possibly use a different class with an archetype with Weapon Training to get similar effects though (Myrmidarch and Sohei come to mind).